Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Sorry to hear you're having trouble.
If you have lost access to your account then you would need to complete the account recovery form. You can read more on how to use the form via this link https://support.microsoft.com/en-us/accounts-billing/manage/help-with-the-microsoft-account-recovery-form. Once completed please keep an eye on your email including the junk/spam folder for a reply.