Sole Global Admin locked out by MFA - phone support unreachable for months

I am the sole Global Administrator of a small Microsoft 365 Business Standard tenant (domain debuule.com). My MFA registration was lost after a phone reset. There is no other admin and self-service password reset is not enabled. I know my password; only the second factor is missing.

Case 2605021420000265 (May 2026) was archived after a missed callback. My email reply on 5 November got no response. Today I spent almost an hour on hold at 0800 020 5934 in silence, the number shown in the admin center (0800 020 2546) says it is unreachable, and I had to set up a separate tenant just to try to reach support, which offers no online request form.

Could a moderator please escalate this to the Data Protection Team to remove the MFA registration for my admin account? I can verify domain ownership via a DNS TXT record within one working day and will share tenant details privately.

To be frank: this is unacceptable. I have been trying to resolve this for months and have lost many hours to it. There is no working route to support for a locked-out admin: every link requires the sign-in I cannot complete, the phone queue goes silent, the callback window is too narrow to catch, and I am now paying for a second tenant just to be heard. I need this resolved this week.