Just to make sure there's nothing listed, click on the link to 'See your purchase history in the App Store or iTunes Store' --> http://support.apple.com/HT204088
If there is then "Request a refund for apps or content that you bought from Apple" read this link --> https://support.apple.com/HT204084
plus start wondering how it got there. Change your password.
You can also contact Apple and ask about this:
Click here --> https://support.apple.com/choose-country-region/media-services Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.
or:
Contact Apple for support and service --> "See a list of Apple phone numbers around the world."
Click here --> https://support.apple.com/HT201232