Help!!!!!!!!!

I was playing MW3 joined a server with alot of players made 1 kill at I was lvl 80. How can this happen? Now is mine score like 51 million exp. But I dont want this lvl.
So how can i reset my stats and its this banable? Because I dont want to get banned for this.

Dear Mathieu

Thank you for your contact.
For future correspondence concerning this case, please refer to the following reference number when contacting Activision Customer Support:111113-005670

Activision will not reset your stats upon request. Please remember this when allowing friends to play on your profile. Also knowingly entering a hacked server may be grounds for a ban. Make sure not to accept game invites from people you don't know or trust.

If you wish to reset your stats you can use a prestige token once you reach the 10th prestige level to reset your stats. This is the only way that you can reset your stats.

Thank you for contacting Activision Customer Support Europe. If you have any further doubts or questions, please don't hesitate contacting us again.

Best regards
Gustaf
Activision Customer Support Team