I'm over 18, but I must have put in the wrong age in my account.

My profile is telling me that I am too young to play Battlefield 3 multiplayer because my account's age is wrong. I called Microsoft about a year ago to fix the priblem, but the guy on the phone didn't think I could change my age back. (When I made my profile, I think I accidentally made my age 6. Now my profile is 12 and a half and I want to get this problem solved so I could play battlefield 3, madden, need for speed etc. without waiting a couple more months. I don't feel like changing my account because I have all of my data, friends, and game files on this one. Is there any way to change its age? Or will I have to wait out the 6 months to play ea games online?