No longer have phone number for 2FA; no emergency code.

Help.  I opened up a DB account using a yahoo email as primary and paying for PLUS, and added a gmail email to it for a secondary email. Got logged out, and now can't log in to primary account because I no longer have the old phone number for 2FA so the code goes to a phone number no one owns, and I can't find the "emergency code" that DB sent years ago. The only account that shows up now is a  basic account tied to gmail and there are only about 30 files in there from the past 2 weeks.  The basic platform isn't anywhere near large enough to hold my stuff - so I absolutely would NOT have created a basic account. DB thinks I opened up another account with basic status - but why on earth would I do that when I pay every month for the PLUS account?  I've been actively loading pics steadily for the past 5 years - but even more over the past 2 years (new granddaughter, and before my dad passed). The payment is definitely still coming out every month for PLUS (yahoo), but it's through a 3rd party (Google Pay). DB has been sent proof of when the account was created, when the gmail email was added as a secondary email, and all payments, via emails and screen shots, but doesn't seem to have any advice beside "cancel the payment" - as soon as I do that - there's nothing to fall back on and I feel like DB can wipe their hands of me, so I can't do that.  They can't help me open the account or unlock it because of the 2FA issue and not being able to come up with the years old emergency code. I am at risk of losing hundreds of photos of my dad before he passed away. ANY help would be appreciated.