This shouldn't happen, but sometimes the payment systems may have issues that occur from time to time.

To fix this
  • You may try turning your device off and on again and see if that helps.
  • Also, see if the "Restore Purchase" button works.

 

If nothing works
If you have tried everything, then please see the following for how to request a refund.

 

If you are using iOS:
https://support.apple.com/en-us/HT204084

 

If you are using Android:
https://support.google.com/googleplay/answer/7205930?co=GENIE.Platform%3DAndroid&oco=1