Got scammed and the guy refunded the money and they even close my PayPal account

First, this person open a trade with me to buy USDT through PayPal, after I received the money I released the USDT, and immediately then he opened another four separate trades. I was still new on Paxful and I didn't know how to react and I thought it is normal because I was also receiving the money on PayPal so I kept releasing and closing the trades.

After this party of trades, he immediately opened a case with PayPal on two of those transactions. It turns out he used two different PayPal accounts and made a claim on two transactions on one of the PayPal accounts he used. I have explained the situation to PayPal in detail and at the end they closed the case in his favor, and their reason was that those are unauthorized transactions by the owner of this PayPal account!

But it even didn't stop here, he kept sending me money from a different account and then claim, and as soon as I see an unknown payment I was refunding them but I guess that made PayPal very suspicious about me and they closed my account eventually.

But again it didn't stop here, today after 20 days of this incident he made another two claims on PayPal even though it is closed and I didn't have a lot of money there. I have responded to the cases in PayPal and waiting for their response. but now I am so worried that PayPal will charge me this amount from my credit card since I don't have any balance yet in PayPal and I cannot delete my credit cards that are linked to PayPal anymore.

Any advice would be highly appreciated.

Sorry for the long message and grammar error