Apple doesn't let us (or any developers) process refunds for payments made via their store. If you've made the purchase via the App Store, please contact Apple directly with your refund request. You can read more about" how to request a refund" at Apple.
For purchases made via the Google Play Store, please contact us through our' contact form'. In your message, please state you are asking for a refund and also make sure you include your Order Id.