Authenticator trouble. Dire need to log in.

Hello.
I'm posting on my second account, due to the fact that my first one has trouble logging in, in that i reach a screen asking for my authenticator code. I have never set up an authenticator code on the account, and I only am logging on for the first time in months today, to do a character transfer from that account to the one i am posting on.
Obviously, i believe i have been hacked, due to the fact that i never set this code up myself, and i very much need to log on to this account briefly for a character transfer.
I understand calling billing is a notable choice, but the chance it will not be fully queued is low, in fact, i still haven't gotten through the last couple times I have tried.
If I can get any help looking up, and removing the code on my account, it's greatly appreciated.