Cardi B got into a heated exchange with the stepson of missing billionaire Hamish Harding as the oxygen in the vanished submersible continued to dwindle on Wednesday night.

Brian Szasz slammed Cardi as “trashy” after the “WAP” rapper dragged Szasz for attending a Blink-182 concert while rescue efforts were underway for his stepfather.

“Cardi B trying to get clout off me and my families [sic] suffering,” Szasz tweeted shortly before deleting his Twitter. “I went to a Blink 182 concert for coping rather than sitting at home and watching the news.”

“Shame on you Cardi get some class!”

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Cardi B clapped back at Brian Szasz after the stepson of missing billionaire Hamish Harding called her”trashy.”iamcardib/instagram

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Cardi B trying to get clout off me and my families [sic] suffering,” Szasz tweeted at the rapper.Facebook/Brian Szasz
Szasz then dragged Cardi’s music career, writing in a separate tweet, “Cardi B we know all your latest releases are trash but is your career this desperate for attention now??”

But Cardi clapped back at Szasz, who also used his situation to shoot his shot with an OnlyFans model.

“The point was the whole world is praying for these people in the submarine and this man son is online shaking d–ks for girls off onlyfans and going to Blink 182 concerts,” Cardi tweeted on Tuesday night. “You was looking for clout all along, nobody knew who you were until you said that was ya stepdad!!!”

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Szasz was responding to Cardi after she slammed him for attending a concert as the search for his stepdad continued.Cardi B / Instagram
“This is why people hate you spoiled brat billionaires yall soo desensitize.”

Several fans agreed with Cardi and flooded twitter reacting to her back-and-forth with Szasz.

“Ignore him sis! You’ve never been wrong!” one fan tweeted.

“I’m with you on this one CARDI,” a second wrote. “The people who are angry at you for speaking your mind on here about current events need to just look somewhere else if it bothers them so much. You show the kids we can call out the bullies and still be praying for the real lives in peril down there.”

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“You was looking for clout all along, nobody knew who you were until you said that was ya stepdad!!!” Cardi tweeted at Harding’s stepson.

“Absolutely, Cardi. His actions were narcissistic and deplorable,” another agreed. “I would be with the rescue mission team if it were someone from my family. I would not be at a concert posting about it — for clout.”

However, others showed more compassion for Szasz as the search mission failed to provide any hopeful updates on his stepdad’s whereabouts.

“Just get off this guy’s case,” one critic tweeted.

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Several of Cardi’s fans had her back on the matter.Cardi B / Instagram

“Girl mind yo business people can grieve how they want,” someone agreed.

“Wait so you’re not allowed to go to Blink 182 concerts if your dad is missing ? That’s an odd rule,” one more added.

Cardi started her feud with Harding’s stepson by posting a video on her Instagram Story where she called him out for not being home while his family copes with the missing submersible.

“People is like, um, ‘What is he supposed to do? Be sad at the house? Is he supposed to go look for him himself?’ Yes,” she said, adding, “You supposed to be right next to the phone waiting to hear any updates about me. You supposed to be consoling your mom and s–t.”

Cardi — who shares daughter Kulture, 4, and son Wave, 1, with husband Offset — also said it’s “sad” that no one in his family “gives a f–k” about the missing billionaire.

“Like, you missing and motherf–kers ready to shake d–ks at concerts,” she said, also noting that she’d rather be broke and know she’s loved than be rich and alone.

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He claimed he attended the concert to “cope” with his missing stepdad.Twitter/@audioguy182
Szasz subsequently deleted his Twitter, calling the whole ordeal “a f–king nightmare.”

“I really appreciate the love and support. Haven’t slept in days. It’s not about me. Obviously just too worried about my mom and the situation so I’m not rocking out or whatever they’re trying to accuse me of doing,” he shared in an Instagram Video on Wednesday.

Szasz first posted about attending the Blink-182 concert on Facebook just moments after announcing that his stepfather was aboard the vanished submersible set out to explore the Titanic wreckage.

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Harding is still missing after the submersible vanished on Sunday.Facebook/Brian Szasz

“It might be distasteful being here but my family would want me to be at the blink-182 show as it’s my favorite band and music helps me in difficult times!” he wrote in Facebook.

Harding, 58, remains missing as of Thursday and is an avid explorer who once traveled to space aboard one of Jeff Bezos’ Blue Origin missions.

He and the other passengers paid OceanGate Expeditions up to $250,000 for their tickets to ride the submersible and travel to the bottom of the Atlantic Ocean.

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“This is why people hate you spoiled brat billionaires yall soo desensitize,” Cardi had tweeted at him amid the rift.Los Angeles Times via Getty Images

But on Sunday, the surface crew lost contact with the submersible just an hour and 45 minutes into their trip and there has been no contact since.

Rescue teams had detected banging noises near the sight of where the submersible disappeared and the Air Force delivered critical equipment and tools to Canada as the “last chance” at a rescue on Tuesday.

By Thursday, experts feared that the submersible had run out of its oxygen supply, though the search and rescue mission is seemingly still on.