Received €300 from a cancelled P2P transaction. Buyer blocked me after I refused to send USDT. What should I do?

Hey everyone, I want some recommendation on a sketchy state of affairs involving a Binance P2P transaction. I’m fairly positive somebody tried to tug a triangle rip-off on me.

It began once I was making an attempt to sell USDT for EUR. I found a buyer with a reliable-looking profile and opened the order. He greeted me and stated he was continuing, but time ran out and the operation was mechanically cancelled. Abruptly, he messaged me saying he despatched the cash anyway and despatched a screenshot. I checked my financial institution and nothing was there, so I informed him it didn't arrive, that the order was cancelled, and asked him to please not do anything. He insisted he sent it, but I couldn't see something, so we left it at that.

Two days later, €300 truly hits my bank account, and I received a message from him asking me to verify. The money was there, but my intestine informed me something was off. I advised him I might return the money, however only by way of a direct financial institution transfer again to the precise origin account. He refused and stored insisting I ship him the equivalent in USDT as an alternative.

Because of this, I referred to as my financial institution to request a reversal. My bank informed me they couldn't do it on their finish and that I needed to manually transfer it again myself. I decided the most secure route was to tell the customer to go to his bank and request the reversal himself. But once I went to message him, I noticed he had already blocked me.

I've officially reported the consumer and the transaction to Binance help. Now, I’m just sitting here with €300 in my checking account. Ought to I just depart the cash untouched till a bank or the precise victim claims it? Has anybody experienced this actual state of affairs earlier than? Any recommendation is appreciated!