You can change or cancel a delivery until 10:00 two days before it's due, and add items until 15:00 that same day. For example, for a Friday delivery you can change or cancel until Wednesday at 10:00, and add items until Wednesday at 15:00.
How to make a change
Log in and go to My Account → Products.
Click the product you want to change.
Update it in the window that opens.
After the cut-off
Message us using the chat in the bottom corner and we'll do what we can.