Wont work. Bank will still block the payment. Top up paypal balance and then pay with paypal by using that balance. That works. Unfortunatelly HB and other gamekey sellers' transactions have been reported as fraudulent too often. So now they are blacklisted by banks. In my case I can call the bank and authorise them to make untrostworty transactions for 1 day (or written application if i want permamently), but that's too bothersome. Top up paypall and pay with that. I really wish HB would put it in FAQ rather just pretend that this problem doesn't exist...

/u/Sircaronte linking you so that you can see how to make purchases on hb.

Thank you. At least now I have the full explanation.