Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
1
Log into your Microsoft account on this link, do you find a Microsoft 365 subscription listed there, and if so, on the left, click Billing, do you see the payment for the subscription listed?
https://account.microsoft.com/services/
If so, click Manage on the subscription, and from there, you can cancel the subscription to get a pro-rata refund and also disable the recurring billing on the subscription.
2
If you are unable to find the subscription listed, using any Microsoft account you may have, try using the steps they provide on this link to find out what that payment was for.
2
If you are still unable to resolve that payment problem, this forum is just a user to user forum, no-one here has any account access, you will need to contact Microsoft Support directly, 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