credit card charge

Check the other steps in the following instructions. They include information on contacting Apple Support if the other steps don't help: If you see apple.com/bill, itunes.com/bill, or an unfamiliar charge on your statement - Apple Support

This is primarily a user-to-user support forum; other Apple users like you.

If I click on the link below from If you see apple.com/bill, itunes.com/bill, or an unfamiliar charge on your statement - Apple Support

two of the options that it gives me is to talk to support by telephone:

If you followed the steps above and you didn't find out why you were charged, contact Apple Support.