I am trying to process payment on devkit using the testcard provided. I swipe it and i get an error:
Transaction refusée: Frais refusés SERV NOT ALLOWED Card type cannot be processed on your merchant account. Ask for another form of payment. Contact support if you beleive this to be incorrect.
I verified in the payment section of my merchant : cash and credit is allowed.
I manage once to get it to work. I dont know why, it only worked once in many may many attenpts.
Do you know how I can resolve this?