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Hello RChapa,
Thank you for posting to Microsoft Community. I will do my best to assist you in this situation.
May I know if there is any other Global Administrator in your Microsoft 365 Business environment?
In case if you are the only admin, please reach out to our Global Customer Service phone to raise a request for resetting your authentication method: Customer service phone numbers - Microsoft Support
Please let me know if you have any questions or concerns in the meantime.
Best regards,
Nero-TR - MSFT | Microsoft Community Support Specialist