Mind you, trading of accounts that require KYC information is banned in this forum, so if indeed you tried to trade with the other user, then you were going against the forum rules. What is the point of buying an account that you can just simply create yourself?
Also, an accusation without any form of proof will not be taken seriously here. If we also get to know that you were trying to cause malicious damage by falsely accusing a member, you will be tagged.