If na opay you dey use, immediately the transaction fail, e go reserve back to the owner, so hence our two dey do transaction and I tell you say the money never enter my aza, baba I no dey release coin oh, if true true say the transaction fail, make him contact him own bank or try to refresh him balance but from my own end, I no dey release yet. Immediately you release coin, Omo those men no go gree send you funds again. Some vendors are even the ones orchestrating those failed transactions just so you can release coin if your not properly grounded of their activities on P2P, lots of them are just scammers.