Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Regarding the admin MFA issue only phone support can help and ask them to escalate your issue to the data protection team. While phone call, press "1" as a business email user and press "1" again as technical support. You also need to provide your subscription purchased information such as company name, billing information, phone number etc. See: https://learn.microsoft.com/en-us/microsoft-365/admin/get-help-support?view=o365-worldwide#phone-support