MFA fail with Live O365 account

I’m desperate. 
I have both a Live Office365 account and a professional Office 365 acct. both use the same email to login and use MS Authenticator for MFA (separate Authenticator instances, of course)
I changed phones recently and my Live MFA does not work. So now, I can’t login to my Live acct (it needs Authenticator to validate) to update my MFA and I can’t update my MFA method or add the account without logging in. It’s completely recursive. 

I’m stuck in a loop and can’t access my email, OneDrive or anything I use regularly.  I have called support 4 times and been on hold for 6 hours each without a rep. I filed a $500 support case through work and after 11 days, no call back!  WTF???!!!

I need to access my Live acct. since I also have a business acct with the same email, all password change and account logins direct me to changing my professional acct which is not helpful. 

After 2 weeks of no access or support, I’m desperate. Any way to change MFA method for an account you CAN’T login to?