Trying to buy FSD for my M3 anticipating an imminent AU price rise. The credit card I used for the initial deposit doesn't have sufficient funds. When I add different cards in my account, it asks for a billing postcode, but only accepts 5 digit numbers rather than the Australian 4 digits. I can get past the form by prefixing with a zero, but the actual payment fails (tried 2 different cards). Anyone got any tricks to add an AU credit card successfully, or am I going to have to call someone on 2nd Jan? Annoyingly when I set it back to my original card with the zero prefix trick, I can see a zero dollar auth transaction on that card, but I can't use that one due to insufficient funds.