What if I have unauthorised charges on my credit card?
Immediately contact your credit card company and report the error over the phone, and in writing.
Also, contact the online shop and report the purchase as unauthorised by you. Follow up with your credit card company to make sure the charge has been removed.
If you see a pattern of unauthorised charges, you may want to cancel the credit card and have a new card issued to halt all unauthorised activity on your account.