Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hi,
Please notify your bank regarding your issue and request that it block or stop your recurring billing from this specific account. If you need help getting the old account back, you may check any of your email addresses you still remember using and see if you can find any MS billing and receipt emails from your subscription, or you may investigate a billing charge on your card to check the details, including the MS account you use. Receipts will also be helpful when your bank needs them when investigating.
Please check it here: How to investigate a billing charge from Microsoft
If you find your Email Address you used, please reset the password.
If you require further assistance, please don't hesitate to let me know.
Stay Safe!