In order to obtain a refund for a purchase in a Ooblada game that experienced a technical issue on android, you will have to find your receipt in your email and forward us the email of your "Google Play Order Receipt" for that purchase.
if you want to now more on how you can find the receipt, we recommend for you to go to their guide.
Also, you can help prevent accidental purchases on your device from the Play Store app by turning on authentication. Find how here.
Get gift, meet friends and let us know your feedback: make sure to connect with our lovely communities:
https://www.facebook.com/riddlestone/
https://www.facebook.com/Neolympia/
https://www.instagram.com/riddlestones/
https://www.instagram.com/puzzleclashheroes