As far as I know, vac bans are bans from Steam. In that case, you may want to contact Steam Support for further assistance.
Also, bans are final and absolute and to that there is nothing that we or you can do since it is irreversible.
We understand your concern regarding your account; however, VAC bans are issued by Steam. We have no further details regarding an account ban.
More information can be found here http://support.activision.com/articles/en_US/FAQ/Call-of-Duty-Ghosts-Online-Code -of-Conduct/?q=Call+of+Duty%3A+Ghosts+Security+&l=en_US&c=Game_Title%3AAll&fs=Se arch&pn=1
Please note: Ban appeals and/or discussions regarding bans are not permitted within the community forums. In accordance to the community guidelines https://community.callofduty.com/message/414449748#414449748 this post will be locked.