Here is how you can return your purchase from Google Play Store: 

Within 2 hours of purchase

You can usually return any app or game within 2 hours for a full refund.

  1. Open the Google Play Store app Google Play.
  2. Touch the menu icon Google Play Store Menu Icon> My account.
  3. Scroll down to Order History and find the app or game you'd like to return.
  4. Touch Refund to complete your refund and uninstall the app.

Note: you can only return an app or game for a refund once. If you buy it again you will not be able to get a refund.

Contact Google Support

Click here for for requesting refund from Google Play - Request for refund from Google Play

Click here to get your purchase order details from Google Play .

Click here to fill a form to Request Call Back from Google Support 

In-app purchases (purchases made within apps & games)