I sold my account https://bitcointalk.org/index.php?action=profile;u=471336  and the guy who bought it refuses to pay me, he owes me $250 in btc.  

Can someone please help me get my account back or something. or please kick this guy off my account.

Edit: I didn't know account selling was frowned upon, why are people taking accounts as collateral in the lending section?

I'm leaving the btc world because of the crashing prices and constant stress it's causing me.