I want a refund, please.
Transparency with our players is the most important thing to us.
If for some reason you would like a refund you can contact us using Google Play.
Browse or search for the app.
Locate and select the app to open the detail page.
Scroll down to the "Additional information" section.
Review the contact information listed.
When you contact us, please let us know:
The Game you’re playing. Examples include "Real Boxing 2 ROCKY," "Road Hopper" or "Godfire."
The issue you’re having. Such as "My in-app purchase didn’t come through," or "the app isn’t working properly when I open it."
The response you’d like. For example, mention whether you’d like help fixing the issue or would like a refund for your purchase.
More about it HERE