Hi Valerie,
Thank you for posting, I am here to help. I’m Sorry you are having this Problem. You need to investigate this charge from your Microsoft billing history by signing to your Microsoft Account.
Click this to open the page: https://account.microsoft.com/services/microsoft365
Log in using your Microsoft Account. Find your subscription and select Manage. On the next page, select Cancel then Scroll through and follow the instructions on the page to proceed with cancellation.
For more details you can check this article:
How to get a refund on a Microsoft subscription
I hope you find this information helpful. Please let us know if you have any further questions If the answer is helpful, please click "Accept Answer".
Best regards,
Jansher