iTunes purchase

Did you check your purchase history, to find out more about the payment?

See your purchase history for the App Store or iTunes Store - Apple Support

Also check these infos:

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If you see purchases that you don't recognize or unexpected charges

• If you see items in your purchase history that you don't remember buying, check if someone else who uses your device, such as a family member, bought the item. If someone else is using your Apple ID and password, change your Apple ID password.
• If you don't recognize a charge on your statement from your bank or financial institution, try these steps.
• If you still need help, contact Apple Support.

Learn more

• If you see an in-app purchase in your purchase history but you don't see it in the app, learn how to restore in-app purchases.
• Get more information about how to request a refund.
• Before you can request a refund, you might need to pay for pending purchases or fix a problem with your payment method.
• Learn about how App Store and iTunes Store purchases are billed.
• If you received a suspicious email notification about a purchase, the email might not be from Apple or reflect actual charges to your account. Learn how to identify legitimate App Store or iTunes Store emails.

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copied from: See your purchase history for the App Store or iTunes Store - Apple Support