Ok. I will tell you that this is usually due to:
- Utilizing unauthorized hardware/software/account modifications to gain an advantage or disrupt the competitive landscape of Xbox LIVE
- Exploiting game vulnerabilities or glitches to gain an unfair competitive advantage
- Network interference or manipulation
- Intentionally playing with someone who is using unauthorized software or methods
Suspensions are never reversed I'm sorry to say.
To find out for sure, you can post a message in the XBOX Live Support Forums When you do this, a member of the support team will look up your gamertag and give you the reason - usually within 24 hours.
I'm sorry that this is not good news. Please don't shoot the messenger. I'm simply trying to help you understand why your account is blacklisted.
I'll be here if you need further help with this issue. I'll respond as quick as I can. I want you to be completely satisfied with my service today. If you consider your issue resolved, I wish you the best and I hope that we can work together again soon. Please do not forget to rate the service you received today.