@Muhammad Istiqlal Thanks for posting in our Q&A. For this issue, it is not related to windows 365. It is related to office 365 admin access.
From your description, I know that the only admin account is locked. Given this situation, please contact Microsoft 365 support. Here is the Global Customer Service phone numbers:
https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
Hope it will help.
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