Google does not provide Pixowl with the transaction information necessary to do refunds. In order to request a refund from Google, please visit their support page – Https://support.google.com/googleplay/contact/apps_refunds_payments_issues/ .
For purchases made on Amazon Kindle devices, you will need to contact Amazon’s Customer Service team to request a refund.http://www.amazon.com/gp/help/customer/display.html?nodeId=901888