If you have purchased an app, you can make the right of withdrawal within two hours to get a full refund
It happens on Google Play, where the redelivery times indicated by Google had fallen by up to 15 minutes. How does it work?
On the device
Open the Google Play Store Touch My apps.Select the app or game you want to return. Select Refund.
On the computer (play.google.com)
Visit Google Play from your browser. Click on the gear icon Settings> My orders.Go to the app or game you want to be reimbursed for. Click on the icon Menu which is displayed.Select Report a problem, then select the repayment option. Describe the reason for the refund, then click Submit.
Find all the useful info here.