Hack deleted version ?

Hi, i'm not on my account but on my friend account.
He can't play no more, I bought the game but now the game just say "Play Demo" he can't log his account, wenn he go to Minecraft Account, it say He not bought the game...

His nickname was "EveryFing" but I saw on the web on McPlayerSearch is nick was change to "Past3que"

Thanks to resolving this things...