Your mailing address is also known as your billing address because it's where we send your bills. The supply address is where the services are being supplied.
You can change to eBilling and get your bills online in My Account under Bill Notifications. To update your mailing/billing address, you'll need to chat with us.
If you're already on eBilling, we'll only use your mailing address for some communications that we're required to send by post. If you need the address on your bills, we can arrange this over chat.