Upgrade

Hi, I followed the link in order to upgrade to the Standard plan, entered the information requested but when I had completed all of that your payment system threw up a whole slew of problems and then just sat there with a revolving icon saying the transaction was in progress (I gave up in the end and clicked on Cancel & Return). I checked that all of my card details were correct so I have to assume that there was a problem with a non-US address (one of the possible problems identified was an all zero zip code?).

Please advise.
Thanks
Chris Grey

Chris Grey