Our warehouse is highly efficient and operates at lightning speed. An order placed at 2pm will most likely get shipped the same day. If you wish to cancel an open order, please notify us ASAP, and we'll do our best to have it canceled; however, there is no guarantee. If the package gets shipped, the next step would be to return it to us once it arrives for a full refund, excluding shipping. The simplest way to add an item to your existing order is to place a new one. You can then email us both order numbers with a request to combine shipping. If neither order has shipped, we may be able to combine them into one package and reimburse you for any access shipping charges. Please note order combination is not available during the Holidays.