Amazon refund digital order.
The best way to get a refund from Amazon for your digital purchases is to speak to the Amazon Customer Service Center. When first contacting Amazon by chat you’ll be asked to briefly explain your issue. Be polite and get to the point.
Amazon refund policy for Kindle books and apps;
Books purchased from the Kindle Store can be returned within 7 days of sale. Once a refund is issued, you no longer have access to the book. To request a refund and return content, visit “Manage Your Content and Devices,” select the “Actions” button next to the title you'd like to return and select “Return for Refund.”
Kindle books you receive as a gift are eligible for exchange for an Amazon Gift Card before acceptance.
Apps and In-App Products purchased from the Amazon Appstore may be eligible for a refund within 90 days of the sale, depending on the circumstances. To request a refund, visit “ Your Orders” and select “Return for Refund” next to the order. If you do not see a “Return for Refund” button, you are not eligible for a refund.
Read more about refunds for specific digital services and content here.