If you have received an unauthorized or unknown bill from Apple iTunes store on your credit card or bank account, it means that your account information has been stolen and abused. You should call your credit card or bank customer service and change your password ASAP. You can also call the Apple iTunes Store customer number 866-712-7753 or visit www.Apple.com/support/cc to cancel your bill by contact the customer support.
How to get online email support:
1. Open the website link www.Apple.com/support/cc.
2. On the left bottom, click on the “Contact Support” link, you’ll go to the online support page on account management, purchases, billing, iTunes cards and codes, or related topics. Just click on the “Contact iTunes Store support” to continue.
3. Then you need to select a topic, just click on “Purchases, Billing & Redemption” and select “The topic is not listed”. Enter a topic title “unauthorized bill” and click on the “Next” button.
4. Now you can start to email to Apple Support person by Email. Just fill out your contact information and your bill details and submit your claim. You’ll get a reply within 2-3 business days.
Wish it can help you solve the problem!