I had an acount like 9 months ago worked amazing but i quit wow and the account is still valid and i came back for cata....um but i cant log in now and there is this thing called Key what do i do..?
Seems like you have been hacked and the hacker attached an Authenticator to your account. I don't know what you can do except call/email Blizzard and provide them with proof that you are the account owner. :s
I had the same thing a long time ago and blizz probably sent you an email a looooong time ago saying you were accessed by a hacker of some sort. You would need to call blizzard to get your account back
