Simon the robot. tell him difficulty to register. He's going to ask you questions, and at some point he's going to ask you if you want to talk to a human. you say yes and you ask for a ticket and you explain the situation to the moderator.
Did you register or not at all? If yes enter your account and modify your postal code on your profile. Otherwise you have to chat with Simon the robot. tell him difficulty to register. He's going to ask you questions, and at some point he's going to ...
Go back to your account, then profile and modify profile and will change your postal code. Your postal code must be in upper case and in numbers without spaces.
If it's for your registration and paying your monthly fees in automatic payment, you don't have to have a credit card. You can pay your fees with your debit card if you have one. Me this is how I paid and everything works fine and the payments go up ...