Ok so this is a tut. if you get the message when you try to connect that says : COD servers are not avalible at this time pls try Status for update.
To check if you are banned goto
left top corner click View
then click settings ( near bottom)
then click tab account
then the 3rd thing down is VAC status
at the end of that txt there should be a little "?" with a circal around it
and there you go.