Coins can be refunded in Google Play Store and the App Store. Follow the relevant refund policies.
Please refer to the help section to process your refund, and for further inquires, please contact the Google Play Store and App Store customer service centers.
[Google Play Store] https://support.google.com/googleplay
[App Store] https://support.apple.com/choose-country-region
* After you have canceled/refunded your emoticons but continue to use them, your account may be penalized or deleted according to our internal policies.