I did not autorized to take money from my card

The following has instructions on how to see the details of what the charge was for: See your purchase history in the iTunes Store on a Mac or PC - Apple Support

More instructions on how to report a problem: Get help with an item purchased from the iTunes Store, App Store, Mac App Store, or iBooks Store - Apple Support

The charge may be due to a subscription.

Just in case, check here > View, change, or cancel your subscriptions - Apple Support

If that's not the issue, you can contact Apple directly here > iTunes: Contact Us