Don't worry, the unbinding process won't take long if you have everything you need to apply.
For normal operation of 2fa, you must have the same time on your computer and phone.
If everything is in order with you over time, create an application in this section:
https://forum.wowcircle.com/forumdisplay.php?f=1748
By form:
1. Nicknames for all characters on the account/class and race.
2. Account login.
3. The email address associated with the account.
4. Last login date.
5. A description of the problem, and which one-time code app you were using.
6. Screenshots of the game on the characters of the account (from 8 pieces).
7. Screenshot of a letter from the mail, where the activation of 2fa is visible.