You update your address and your phone number in your customer account. Here is how to:
1. Log in to your customer account.
2. Go to "Delivery address" in the left side menu.
3. Press "edit address" underneath your current one.
4. Put in the new information (name, address, phone number) and press "update address".
Remember that the deadline for updating the information for your upcoming box is Friday at 23.59.