From the moment your order is confirmed:

It is no longer possible to request a change to the delivery address or modify the contents of your order (item reference – size – color).
To ensure express service for our customers, any order placed before 2 p.m. is prepared and shipped the same day (excluding weekends).

From the moment your order status is "In preparation":

Unfortunately, it can no longer be cancelled, as this means it is being processed and/or has already been shipped. You will need to return your order once received (go to the "Returns, Exchanges & Refunds" section).

A REMEDY IS POSSIBLE IF:

The order status is "Pending". You can cancel your order directly from the "MY ACCOUNT" section, then "My order tracking", and click on "Cancel my order". You can then place a new order if you wish.