You can update your shipping address via your account. Head on over to the Login Page and enter your details. Once you're logged in, click on the tab that says Account Details. If you're on desktop, its the penultimate on the list to the left of the screen. On mobile, click on the drop down menu "My Account" that you can see just under the Wild logo, and Account Details are, again, the penultimate tab. Here, you should be able to add a new address, and select it to be your default address.
If you've having any trouble with this, please do email us!