being a merchant on binance I face very irritating behavior by the new users specially in pkr they just mark the order as paid without paying to seller so maybe in this he continuously do that some sellers report him so binance team disable p2p on his account for temporary he needs to contact support team to resolve the issue.
So, you mean to say that OP has marked the orders as completed without actually transferring the money and therefore his P2P binance account is disabled?
Usually if one party tries to cheat, binance will take the proof from other party and resolve the query. For example, if he has not released the money, the bitcoin or USDT in escrow would not have released so there is no point cheating in binance P2P.