I'm locked-out of my Firefox Account, can't update my addons

Hi,

I have been trying to connect to addons.mozilla.org to update one of my extensions https://addons.mozilla.org/en-US/firefox/addon/time-capsule/ but I couldn’t properly setup a 2FA app as none was available on FDroid (back when I tried), and while recovery codes worked for a while, all my recovery codes now seem to fail. Requesting new codes also fail as the page at https://accounts.firefox.com/signin_token_code tells me it sends me in email with new codes, but that email never arrives.

Could someone help me unlock that situation, either by helping me to connect to that account or by transferring ownership of those addons to a new account?

Thanks in advance for any help!