To log back and remove Blizzard Authenticator from your account you need to contact World of Warcraft billing department providing this info:
* Your full real name.
* Your full address including postal or zip code.
* Your full email address (currently registered on the account).
* Your account name.
* The authentication key used to create the account.
* Your Secret question and answer.
* The last 4 digits of the credit card used on the account plus the expiration date OR the full code of a gamecard activated on the account.
* A legible fax, scan or photo of a piece of government-issued photo identification, such as a passport or driving license matching the first and last name of the registered account owner.
* A legible fax, scan or photo of the Authenticator token, with the code on the back fully visible.
Blizzard Authenticator - WoWWiki - Your guide to the World of Warcraft
-Bloodkip