PS3 Can anyone please help me revert/reset my profile on MW3?

[bizarrewitness]

Someone in a lobby I joined unlocked all my weapons, emblems, etc. and I'm just looking to either revert back to the level I was or just start from zero.

If anyone could please kindly help me out I'd very much appreciate it.

 

[mimi]

you must contact activision support
But its very unlikely they will do anything