Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
Using any Microsoft account you may have, try using the steps they provide on this link to try to find your subscription the payment is for.
2
If you are still unable to resolve this subscription problem, this forum is just a user to user forum, no-one here has any account access, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option