2 factor authentication is not working. When I submit the correct code, it is not accepted, so I have to log in with a backup code (of which I have no more). When I try to turn off 2 factor, I do so in my account settings and then select "save changes". But when I go back to the settings, 2 factor is always marked as enabled again. I also cannot set up any new kind of multi-factor authentication because email and phone numbers are "not valid" and there is no code that appears to reset the authentication app. What can I do? I will be locked out of my account after this :(