Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Please note that this is a user-to-user support forum, not an official Microsoft Support channel. I can share guidance based on publicly available information, but I do not have access to Microsoft's internal systems to investigate or reset your MFA registration directly, or to escalate your case to Microsoft's internal support teams.
In this situation, you may need to contact Microsoft Support for assistance with recovering access to your Azure subscription and resolving the MFA issue, particularly if you are the only administrator.
You can contact Microsoft Support by phone: Customer service phone numbers - Microsoft Support
When a call is made to support, the first step is typically an automated voice response system. In some countries, you may need to answer a series of automated questions before being connected to a representative.
Here's an example of responses that have helped other users reach a support representative:
IVR: What kind of problem are you worried about?
You: Admin account locked
IVR: What kind of product do you use?
You: Office 365 for business
IVR: Does it count for education or business?
You: For Business
IVR: Are you an admin?
You: Yes
IVR: Do you have another administrator in your organization?
You: No
IVR: Need a service request?
You: Yes
This should help you connect with a live support agent who can help you directly.
Once connected, the support agent may be able to review available support options and determine the appropriate team to investigate the issue further.
I hope this information helps.