I tried to unlink “google authenticator” by going to account recovery, since my iphone was swapped by apple. After entering the required info including my email address, serial number and a charactor name, there were 2 buttons available: “reset password” and “unlink authentication”. However, after clicking on the unlink and confirming, I got a message" there’s been an error, contact support". I repeated the process several times, the same result.
Same problem as you, I got my phone replaced and the only reason I am able to get on the forum is because I have my phones IP saved so it doesn’t ask me for the authenticator. However I didn’t save my hard wire connection and trying to play on 3g isn’t going to happen lol. Hopefully they get that link working so I can reset my authenticator.