So sorry for the delay, Zia! On occasion, the process does seem to hiccup, but all of our testing has determined that it's an issue with Amazon (yes, I know that's not precisely helpful).

If Amazon gave you details, and if you're comfortable sending the transcript, you can click the link in my signature, and fill out a Support Request, and copy it there, or attach it. I can also help you get your coins that way if you haven't received them yet. In many reports, players have powered down their devices then received the coins.