We can help you make certain changes to your order until it is paid. If you have not paid yet, simply cancel the order and make a new one.
Once your order is paid for and is processing, unfortunately it is not possible to add to, edit or cancel your order -- once you accept the Terms & Conditions of the order, we will fulfill your order as per the agreement.
Additionally, please note that any refunds issued for paid orders will be issued via store credit.