Please check that all parts of your account details which you have enetered are correct
Also please check that you have entered the three digit security code at the back of your card correctly,
If this still doesnt work, please try uing another card to process the order. Sometimes the issuer will decline your card, and as they do not tell us why, it's best to check with them.
If you still struggling to get your payment to go through, you can place an order over the phone by calling 08435236169, and choosing extension 1 to talk to one of our sales team.