Hello Abdul Basit3,
Greetings! Thank you for posting in the Microsoft forum.
May I confirm if you disabled your device from https://myaccount.microsoft.com/device-list page?
When we disable a device, we disable the access of all organization’s account on the specified computer. If you disabled a device by mistake, there's no way to undo it. You'll have to contact your organization's administrator to get the bit locker key and enable the device again.
Unfortunately, a user with no admin access cannot enable a disabled device because the device has to enabled from Azure Active Directory admin center and only admins have the access to this page.
For reference, see: Manage your connected devices from the Devices page
If you don't know who to contact at your work or school for help, try asking the person who gave you your Microsoft 365 user account and password.
To know how to find the admin, see How do I find my Microsoft 365 admin?
If my understanding above is not consistent with yours, you can also post back and point that out.
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Sincerely,
Neha | Microsoft Community Moderator