You can only change an order for an in-stock item on the day that the order was placed: contact our Customer Service team with your order number, and they will update or change your order as required.
To change an order for an in-stock item after the day on which it was ordered, please wait for it to be delivered, then return it in accordance with our returns policy.
Orders out-of-stock items, or those not yet published, can be changed at any time before the item is in stock or has been published.