email tied to moz account is DoA and i can't add a secondary?

Hi - My mozilla email is tied to my old work email, i.e. a company I left in 2018. That company has long since folded. I never added a secondary email. I'm now trying to use features like the VPN etc but need to sign in to do so. Despite being signed in on mozilla(and remaining that way since 2018 across two laptop transitions) it still wants to send me a code to the old work email which is defunct and no longer active. It's kind of an even bigger problem because now I have to remember to navigate to this here forum since I won't get email notifications that someone replied! :) What do I do? Is there anything I *CAN* do or am I S-O-L as they say? Again, the gold is just to switch out the primary email for my current, working, personal gmail lol Many thanks.