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

Hey everybody, I want some recommendation on a sketchy state of affairs involving a Binance P2P transaction. I’m fairly positive someone tried to tug a triangle scam on me.

It started once I was making an attempt to promote USDT for EUR. I found a buyer 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. Instantly, 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 despatched it, however I couldn't see anything, so we left it at that.

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

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

I've formally reported the consumer and the transaction to Binance help. Now, I’m simply sitting here with €300 in my checking account. Ought to I simply depart the money untouched till a bank or the actual victim claims it? Has anyone skilled this actual state of affairs before? Any advice is appreciated!