Once an order has been placed on Hayhouse.com, it is generally considered final and cannot be modified. This includes changes to the items, shipping address, or payment method. However, depending on the status of the order, it may be possible to cancel it entirely and then place a new order with the desired modifications. The process for cancellation and any related policies can be found on the website, as they may vary based on the specifics of the order and current circumstances. It is advisable to quickly review the relevant web page for the most accurate and up-to-date information regarding order changes and cancellations. If the order is still in the processing stage, reaching out to customer support may be beneficial. However, as a reminder, it is best to look on the current web page for any applicable contact details or further assistance related to your inquiry.