Please note we’re not Microsoft but fellow users like yourself & have no access to accounts.
Try recovering your account here:
https://support.microsoft.com/account-billing/how-to-recover-a-hacked-or-compromised-microsoft-account-24ca907d-bcdf-a44b-4656-47f0cd89c245
Or:
https://support.microsoft.com/account-billing/you-can-t-sign-in-to-your-microsoft-account-475c9b5c-8c25-49f1-9c2d-c64b7072e735
If none of the above work then you’ll require the account recovery form:
https://account.live.com/acsr
Please note if you have 2/multi factor authentication active on your account then you cannot use the form to recover the account.
If you’re successful in changing the details then you may find that the account is limited for 30 days, this is a security feature & cannot be circumvented.
Please be aware that as the email address has been changed to that of the hacker &/or 2fa/mfa has been enabled then usually there’s nothing which can be done.
Your only option may be to create a new account then request Microsoft transfer any purchases & subscriptions to the new account.