I am in the same position as you, my phone crashed, I had to factory reset, and I don't have qr code or key for google authenticator. I can't sign in my bitfinex account. I send them a ticket. Any new information would be appreciated. Did you manage to sign in after you send them the ticket?
I haven't dealt with this myself. I had a friend who lost access to their 2FA on BTC-e and they allowed him to log in after freezing the account for ~2 weeks, since he had his login, control of his email address, and could provide ID/selfie. I'm guessing there is a similar recovery protocol at Bitfinex...... I would hope that they would freeze withdrawals for a period of time in case there was a dispute over account ownership.
This is an important lesson: Always make multiple backups of your 2FA secret when you generate it. I put one on my main phone, one on an old phone that never leaves my house. I also write the code down on paper in case both devices fail.