M365 only admin locked out MFA error 53003

I am learning this the hard way....so here it goes.

Currently I am locked out of as the only admin on the tenant with error 53003.

I was updating some Microsoft MFA default policy settings in Entra and mistakenly deleted the admin user from the exclusions list, and got locked out.

Thankfully I have another tenant, not as big the one locked out. Initiated several support tickets for which everyone calls, and despite of subline mentioning the issue says that they have to assign this ticket to Entra. Then the ticket gets updated and noone has been assigned every since. I have initiated severity A support tickets from Azure portal but no one has called in last 24 hours to help. We area business with Business Premium licenses with over 20 users, and now completely locked out. 

I have looked almost everywhere online. There is no phone number that takes you to a support agent - PLEASE HELP........