Most errors happen when the billing address doesn't match the address connected to your credit card.  Make sure that the billing address is the same as your credit/debit card.  If you are using a prepaid credit card (such as Vanilla Mastercard or Visa prepaid) make sure that you have registered your card at www.vanillamastercard.com or at www.visa.com.If this doesn't solve the issue please let us know by using the "contact us" page and we will do our best to help you.