I can't get my self unbanned from Arma II OA, I bought a new copy of the game and ran Arma 2 and Arma 2 OA. Then I download DayZ commander and I tried joining a server then it said I was battle Global ban still.
If you bought a new key, Go onto the steam account you bought it with, Then change it with darky's key changer when you're off steam, otherwise, Use darky's key changer with a key from the marketplace, but remember to NEVER run steam!
the only person that can ban you, is the big chief mr battleye himself. no admin or hacker or player can do this. In addition to this the big chief mr battleye will ban you based on the bypasser you're using NOT what scripts you are using.
Not sure how many people here know this but if your key was STOLEN (Ie you were stupid and downloaded a youtube video link ) you CAN get your key back. Takes some effort and about 2 weeks time but you will get a full, legit, unstolen/activated/banned/etc key.