Okay, my account just went through Xbox's investigation team because it had unauthorized access for awhile and I recently got the email to reset everything and get back to playing on my account
Well, I go to play Call of Duty Black Ops and it turns out I'm permanently banned! So, what do I do? I bought all the map packs and I want to play.
I checked my stats with Call of Duty Elite and I'm 15th Prestige level 50 (highest rank achievable) with a total of 26 hours played online multiplayer so I'm taking a good guess and saying that's the reason my account is banned from Black Ops.