Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
Log into any Microsoft account you may have using any of your Email addresses on this link to try to find the previous subscription.
https://account.microsoft.com/services/
If you are able to find the previous subscription, click Manage on the subscription and you can cancel it from there.
2
If you are still unable to find the subscription, try using the steps provided on this link to try to recover access to that account.