Hello PRAGATI EM SCHOOL RAJAHMUNDRY
Might I ask a few questions to see if I can do anything more for you?
I see that you have tried reaching Microsoft Support. If so, could you please let me know whether you have already submitted a support request and obtained a ticket ID? Did you work directly with Microsoft Support?
As I understand it, to regain access to the Admin Center in this situation for admin accounts, the available options are either contacting Microsoft Support by phone or reaching out through the Admin Center. However, since all of your admin accounts have been disabled, I will provide the two available methods again for you to reach the Microsoft Data Protection Team.
(If you have not yet reached the stage of obtaining a ticket ID and communicating directly with them, please review the two methods below to see whether there is anything that may help improve the situation.)
*Please note that you may be asked to provide proof of administrative ownership, such as domain or billing information, before assistance can be provided, due to privacy and security requirements.
1/ Contacting Microsoft Data Protection team by phone support
In this situation, the Microsoft Data Protection team has tools and processes in place to verify identity and regain access to administrator accounts.
Therefore, if you are the only administrator in your organization, then you need to involve Microsoft data protection team. Please try to find the related hotline number to call the frontline let them raise a ticket for you: Customer service phone numbers - Microsoft Support
If you can use English, you may prefer these numbers:


(Important Note: Depending on your country or region, when you call the support number, you may hear an introduction of about 30 seconds such as "you can visit the link...". You can ignore this introduction and wait until you are presented with the options. Then press "1" as a business email user, and again "1" for technical help.)
In some countries, this is an automated conversation: First, when you call the hotline, they will ask you what kind of problem you are struggling with.
Answer: Authenticator.
A: What products do you use?
B: Office 365 for business.
Verification: Education or company account?
B: For companies
A: Are you an administrator?
B: Yes.
A: Are there any other administrators in your organization?
B: No.
A: I need one.... Service request?
B: Yes
Please try "2 or 3"times until you can reach out to an agent.
2/ Another work around
If you still cannot reach to agent, there is still a workaround, you might consider registering for a new tenant by signing up for a trial subscription. This would allow you to create a new tenant following the prompts provided. Once set up, you can access the admin console of the new tenant and submit a support ticket requesting to speak with the Data Protection team on behalf of your previous tenant.
For detailed guidance, to set up a new tenant, please follow these steps:

Once your tenant is created, you should be able to access the support portal and submit your ticket without further issues
Ticket Support: In the Microsoft 365 Admin Center->Support->Help & Support. You can raise support ticket In Microsoft Admin Center by this link:
https://admin.microsoft.com/#/support/requests


Tips: You can switch off the Support Assistant as shown in the screenshot, then type "Contact Support" into the search box and select "Contact Support" or the "earphone symbol" above..
- Choose "Phone" support and fill all the details of this issue.
- Click "Contact me"
After completing them, you will receive an email appointment for a meeting to review this issue professionally together.
*Please remember to cancel the trial subscription once your issue is resolved to avoid any unintended charges.
_
I truly wish I could help you further. However, only the Microsoft Data Protection team is authorized to access the backend account data and perform account ownership verification or recovery. That is why I am trying to guide you to contact them directly.
If you have already tried any of the steps below, please feel free to skip them.
Wish you all the best!