Oh man, sorry to hear that. I had a secondary Dropbox account I used for a few small but important documents. At some point I somehow lost the 2FA factor, and I don't know how as I've managed to keep the 2FA for every other one of my services across multiple app/os/phone installs.

Anyway, I reached out to their support for help and they were utterly useless. I had a couple weeks of back and forth with them before giving up. I hope I never actually need those docs.

I hope you have a better outcome than I did.