I'm getting this problem too, trying to buy Torchlight 2 from Runic Games, my friend has also tried with the same error, both of us have verified our bank accounts, & confirmed our cards. I just tried the different browser thing, using IE instead of FF, still no joy. Never had any problems buying anything online before, & I have easily enough money to cover the purchase in my account. Both me & my friend are in the uk, & with barclays.
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