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 advice 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 promote USDT for EUR. I found a purchaser with a reliable-looking profile and opened the order. He greeted me and stated he was proceeding, but time ran out and the operation was mechanically cancelled. All of the sudden, he messaged me saying he sent the money anyway and sent a screenshot. I checked my bank and nothing was there, so I advised 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 examine. The money was there, however my gut informed me one thing was off. I informed him I might return the cash, however only by way of a direct bank switch again to the precise origin account. He refused and stored insisting I send him the equal in USDT as an alternative.

Due to this, I referred to as my financial institution to request a reversal. My bank advised me they couldn't do it on their finish and that I needed to manually switch it again myself. I made a decision the most secure route was to inform the customer to go to his bank and request the reversal himself. However 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 simply sitting here with €300 in my bank account. Should I just depart the money untouched until a financial institution or the precise victim claims it? Has anyone experienced this actual state of affairs before? Any recommendation is appreciated!