The address you have used seems to be based outside of the UK. As explained in our terms and conditions we are currently unable to take overseas orders through the website but this is something we are working on adding soon. If you would like to proceed with your order, our colleagues at Tretower Court can provide a more accurate quote for postage and packing and will process your order over the phone.
Please contact the team directly at Tretowercourt@gov.wales. The site is open Thursday to Saturday each week, 10am till 4pm (London GMT) and the phone number is 00 44 (0)1874 730279.