Hello,
If you do not remember registering your credit card information with any Microsoft service, the charge may indicate unauthorized use of your card.
If you have previously registered your credit card with a Microsoft service, please review the support article “How to investigate charges from Microsoft” to verify the details of the transaction.
How to investigate a billing charge from Microsoft
If the charge still cannot be identified after checking, contact your credit card company to request an investigation and, if necessary, have the card suspended.