Sorry, you cant appeal for an unban here. But its just forum policy Call of Duty: Black Ops II - Security & Enforcement Policy
Temporary bans can range from 48 hours to 2 weeks, depending on the severity of the infraction. Permanent bans are lasting and final.
A minor offense is one in which no quantifiable damage has been done to another user or the game community at large. An extreme offense is one in which a player has caused detriment to other users or has organized large groups of users to commit additional offenses.
Really sorry to hear this, bro, but like what Shadowelite said, there's really nothing that can be done anymore. You can check out the link he gave, but bans are final and there's really nothing support can do about it. You can check on this link for more details about support's response for bans: http://support.activision.com/articles/en_US/FAQ/Temporary-or-Permanent-Ban/