[Help]MW3 4D1 15 custom classes remove

Hello, as the title suggests, for some reason , after starting to play MW3 on 4D1 , my classes suddently went to 15. It's really annoying, they are too many and they spoil the fun of unlocking more custom classes. I've searched for hours MPGH for an trainer to 4d1 and every single trainer that had the option to change the number of custom classes, had one big message for me " MW3 was not found! ". I tried running the trainer first, or starting mw3 first, but to no avail.

Can anyone help me have the normal 5 custom classes instead of those iritating 15?
Pretty please!

Use a prestige hack to go to Prestige 20 then reset your stats from there.