Hacker broke my account?

Joined a lobby last week on PS3 and straight away a hacker deranked and kicked everybody off the lobby and displayed a pop up message that I was infected by the Eternal Engine or something like that. From that point forward every time I try to join a lobby the PS3 just freezes when game loading is nearly complete.

I tried reinstalling the game patch for MW3 and tried deleting my save games but it didn't help. Campaign and special ops work great.

Anybody have any solution to this or are my MW3 days over?