You must provide proof of payment been sent to the said accused person in a form of txn ID and pray the receiver address is some how linked to the accused person, if the receiver address has not been used by the accused person on the forum then the evidence becomes a dead end. Telegram conversation is not a proof if you are in anyway thinking of bringing a screenshot of a conversation we guys had; compensation is common on telegram. Nobody is a thief till they are caught, no reg tag without concrete evidence.