You need to contact the Amazon Appstore Customer Service directly, as this issue is out of control of G5 Entertainment. We have no access to your account and only the Amazon Appstore support specialists are able to provide you with the refund.
You can also try requesting a refund in the following way:
- Go to "Your Orders".
- Locate the order.
- Select "Problem with order".
- Select your problem from the list.
- Select "Request refund".
- Enter your comments in the text box.
- Select "Submit".