Hi Anna T,
Thank you for reaching out to us. I am Blessing, an independent advisor here and a Microsoft user like you.
I understand your inquiry but first, you need to investigate this charge from your Microsoft billing history by signing into https://account.microsoft.com/billing/orders.
If you find the charge for Microsoft subscription, you can cancel the subscription if you did not authorize it.
Kindly find link for steps on how to cancel Microsoft subscription: https://support.microsoft.com/office/46e2634c-c64b-4c65-94b9-2cc9c960e91b
If you are not able to cancel your subscription or you can not find the charge, you will need to contact Microsoft billing support to assist you investigate this charge using the steps below:
- Go to http://support.office.com/home/chat
- Describe your issue (Unknown charge) and click 'Get Help'. Then scroll down to select Contact support.
- Select your product (Microsoft 365 and Office) and category (manage my subscription) > click Confirm.
- Click ‘Chat with support agent’ > Confirm.
- Click Start Chat.
Hope this helps!