To get a refund, please make a request through the Apple App Store or Google Play Store.
On Android devices:
If you are subscribed through the Google Play Store, please request a refund via this link: https://support.google.com/googleplay/answer/2479637
On Apple devices:
If you are subscribed through the App Store, please request a refund via this link: https://support.apple.com/en-us/118223