Digital Generation credit card payment isn’t working “State code required”

Many users at Digital Generation are reporting problem with payment by credit card, it’s not working but either Coingeneration don’t read the tickets being opened or Admins don’t pay attention in the chat room, only cares about taking people money trial threads and so on. The error message tied to “Billing says “state code is required”” could be coding error when they implemented the integration of accepting credit card. Or maybe because it only accept certain kind of credit card, Visa and Master, no American Express and so on? could be! but indeed there is problem, being addressed but did Digital Generation even pay attention to people’s concern and complaint?