Hello Mariah. Please verify the following steps to help you place an order online due to receiving an error while trying;
1. Please make sure the Billing and shipping address are the same
2. Please make sure you're using a valid credit card.
3. It is best if you use Internet Explorer as your Browser
4. Verify if your credit card has a block from bank to purchase on line.
Please verify these options if you continue to have issue please let us know. Victor21