1. Open Google Play account page from PC
2. Click on the three vertical points icon in the ACTION column and choose "Report a problem" for the app you want to be refunded.
3. In the drop down menu select the the "I'd like to request a refund" option.
4. Fill out the reason why you want a refund and click on the "Send Report" button.
We can not issue refunds for our apps and in-app purchases, please contact Google Support about this issue.