Just installed and set it up. It literally will not let me purchase Robux whatsoever and the support contact page it leads me to is just code. I have uninstalled and reinstalled. I've searched through Google Play to see what the issue is as I've never had this issue with any app before. All it says is "payment not completed." I know I have money on my card, and I know the payment service works. My phone is fully updated and so is the app. It's busted.