I have for days now tried to order the Platinum Jubilee 5 quid commemorative coin. When I finally get to the payment details, they kick back the order claiming that the billing address does not match the state code. I've done everything I could but with negative results. I live in the States and have ordered numerous items from the Dickens House, HRP, National Gallery and Foyles. It was so simple -- just give them my order, delivery info and credit card number. Done! But not with the Royal Mint. I've emailed them but have heard nothing yet. Any suggestions.