I'm sorry if I've posted this is in the wrong thread.

I'm trying to upgrade to the Digital Collector's Edition on the Mogstation, it then takes me to an Account Details page to fill in my name and address but I can't continue from this page as it keeps telling me 'the ZIP/postal code is invalid'.

Is this the correct way to upgrade? Or am I missing something? Can anyone give some information on what I need to do?