My purchase via credit card was canceled

If you are sure that everything is right on your credit card (if there's enough balance, if it's not expired, if the number card is correct, if there's no other pendency on your card that could make your card issuer refuse the transaction), then the refusal may be due to the risk analisys.

As an alternative, if you haven't done yet, you can try any of other payment methods available on Nuuvem. 

Moreover, bear in mind that some games need a verified Paypal account to complete the purchase. If you don't have a verified account yet, you can have more details on how to do that through the link below:

We hope that this tips help you out on your issue, but there's something else that we can help, you click on this awesame button below "Email us" and you be able to get in touch directly with our Support Team. ;)