We at Sinomugs work hard to help you get your orders as fast as possible. So as soon as the payment is accepted and the order is confirmed, it is immediately in the process to be shipped. This means there is only a very small window of time where we can “catch” your order before it is physically picked, packed, and set aside for shipping. Please email us at support@sinomugs.com as soon as possible with the subject line "Cancellation" and your full name and order number. We’ll let you know what we can do!