"I got an email saying I bought something from the iTunes Store, but I didn't!"
Here is what you should do if you get an email claiming to be from iTunes saying that you bought something recently, but you did not buy anything or are unsure what/if you bought.
Make sure that the email really came from iTunes. Legitimate emails have characteristics like this:
Identifying legitimate emails from the iTunes Store - Apple Support
Scam emails have characteristics like this:
Identify and report phishing emails and other suspicious messages - Apple Support
If it is a real message, you can check to see what you were charged for in iTunes:
See your purchase history in the iTunes Store on a Mac or PC - Apple Support
You can also check through this site, which also makes it easy to request a refund:
http://reportaproblem.apple.com
It could be that there is a recurring subscription that you signed up for, which you can manage via:
View, change, or cancel your subscriptions - Apple Support
If you want to get in touch with iTunes Support directly (they usually reply within 24-48 hours), you can contact them by email via this link:
http://apple.com/emea/support/itunes/contact.html
More information, if desired: