You can change your shipping/delivery address online or by using the Numan app:
Through the web:
Log into your Numan Account
Select the subscription you would like to change the delivery address for
Click the 'Edit' button beside your shipping address
Amend the address and click 'Save'
Through the Numan app:
Select the Treatment tab
Select 'Manage Subscription'
Scroll down to 'Delivery and payment details' and press 'Change'
Enter the new address and press 'Save'
Please note, this will need to be done at least three days before your next delivery is due in order to take effect for your next delivery.