I have placed in the TWC group for selling the same proxy. He will have to refund you in full, and if he attempts to sell a duplicate proxy to another user, he will be placed permanently in the TWC and not allowed to have a service thread anymore.
He will have to reimburse for the accounts banned under the proxy also, since he sold a proxy twice that was already flagged. I will need the account stats + bank worth (proof) or I can't have him refund.