SO, GMG has a sale going on and I decided to buy a couple of games using my Visa Debit card. So, I entered the debit card details and checked out but I got the ""Oops, we cannot compute! We are unable to process your order using this card. Please try another card or one of the alternate payment options." error. So, I entered the details again carefully, making sure no error was made. But still the same error. I don't use VPN so that's not a problem and the card works as well as I recently used it on Humble and Indie Gala. I've submitted a support ticket but I was wondering if any of you have faced a problem like that and whether I'm at fault here. Any helpful suggestions will be appreciated.

Edit: I can't use Paypal because it isn't available where I live.

Edit #2: I contacted support and it seems that for some reason, my bank is declining the payment, though I can't imagine why since there are sufficient funds in it. I'll check it though. Thanks for the suggestions everyone.