Why my card has been charged through itunes?

This is primarily a user-to-user support forum; other Apple users like you. We don't have access to any information about your charges. See each of the 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' or an unfamiliar charge on your statement - Apple Support

Use the following instructions to cancel if you haven't already: See or cancel your subscriptions - Apple Support