After I sent a PM to the individual who is using my account he also sent me a PM saying that he bought it from this
guy : btctalkacc who had told him that it was his account.
I'm going to put down the whole message he sent me :

"I bought this account from the seller account (https://bitcointalk.org/index.php?action=profile;u=996789), he said that it is his own account, I did not know that the account is hacked, I'm sorry. Now I'm trying to get him to return my money. If I will not return the money, I'll give you back the account, but after I completed the participation in the bounty "Change". So I can to return at least some of my spent of money from the bounty "