You change your delivery method in your customer account. Here's how to:
1. Log in to your customer account.
2. Go to "My subscriptions" in the left side menu line.
3. Press "Edit" next to your current subscription.
4. Press "Edit" under the headline "Change shipping/pick up".
5. Choose your new delivery method or pick up spot and press "Update shipping".
Please note that the deadline for making changes to your upcoming box is Friday at 23.59.