Hi Chief,
I’m sorry to hear you’re having trouble with your gem order.
You are getting the "high risk" message because the Google Play Store can be a bit too protective. It maximises customer security by trying to detect orders that seem “unusual”. That’s when it may give you a "high risk" warning and cancel the order. There’s no reason to be alarmed -- it is simply an added layer of security to prevent sizeable unauthorised or unintentional purchases from being made with your money. Google might still have put an authorisation on your payment account, but this will clear automatically.
The pop-up asks you to wait 30 minutes, but sometimes we need to ask you to wait a little longer. You might also want to double check that your billing address and your name registered in your Google account (wallet.google.com) are exactly the same as the