Paid items cannot be purchased without user action. If you do not recognize a purchase, please confirm whether a family member or other user made the purchase.
Please note that if your payment was processed through the App Store, multiple purchases may be grouped into a single charge. For details, please refer to the following page:
Apple Support
https://support.apple.com/en-us/118212/localeselector
If you are using Google Play, please refer to the following page:
Google Support
https://support.google.com/accounts/answer/7673989