I have pretty much the same issue. Just purchased the Steaming Stick 4K and trying to order my (free) HDMI extender cable _but_ website will not accept entering my Canadian address Postal Code (not accepted). I've chosen my country of Canada, my Province and my City but website will _not_ accept my correct Postal Code. Spent 30 mins on ROKU "chat" and 20 mins on phone with "support" but no luck. All I want is to order a simple cable and even "support" can order it for me. Should be an easy thing...right? Obviously not.