Cd key problem

So i had purchased a key from some guy, i used a free key for awhile and when i went back to that one it was banned. Great. probobly a re-seller. So than i used a free one, and that one got banned somehow, So i purchased another one, but the server im playing on said detected for trying to bypass global ban. How can i play on this server anymore than??

short answer. you cant

1000000000 of servers play on another. unless you want to change your hwid or w/e he banned you by

Well out of those 1000000000000000 of servers, my squad plays on the one we are on now.... This is just great.... What if i change my in-game name will that matter?