Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear Abhinav Nunkoo
Based on your further description, I'm very sorry that the phone support didn't help you solve the problem, in order to help you and not waste more of your time, please kindly contact our professional authenticator related team directly, please click here: Microsoft Authenticator app forum
In addition, please also kindly try to create a service ticket in the Microsoft 365 admin center****to support > service requests through navigation, as they have more access permissions than on this forum, and professional engineers will further help you.
Note: if you are not using admin account, please kindly ask admin within your organization for help. If you are not sure who is admin, please kindly refer to: How do I find my Microsoft 365 admin? - Microsoft Support
Sincerely hope that your problem will be solved as soon as possible! Wish you have a wonderful day!
Sincerely
Kerry Chen | Community Moderator