In general, the ability to cancel or change an order with Marketwarehouse.com typically depends on the status of the order at the time the request is made. If the order has already been processed or shipped, it may be more challenging to make changes or cancel it. However, if the order is still in processing, there is usually a possibility to request modifications or cancellation. It is advisable to check the specific policies regarding order changes and cancellations on the Marketwarehouse.com website, as these policies can vary based on the type of product purchased or the circumstances surrounding the order. If you need further assistance or guidance, it might be beneficial to look for the relevant contact information on the current web page for the most accurate support related to your situation.