Well, you should ask the guy who sent you the bitcoin from that adress where he sent them from. Which exchange / wallet.

The only possible exchange i currently see where something like this could happen is coinbase, as that is one of the only wallets not listed on https://www.walletexplorer.com/

It could be that the guy is trying to scam you, and that he has already received the money.


There's no way to turn back the transaction, the money is already gone. You might be able to get it back from the exchange/ wallet support, but chances are slim.