Before you ring +61 3 9016 4270..
Norton Subscription Scam. The way this works is the phisher will email you a bill and list their scammer phone number. They want you to call their number. They will then try to gather additional information from you such as credit card information or personal information.
This is an example
If you haven’t ordered it, and they don’t have your bank details, ignore it.
Otherwise search for the genuine Norton contact number, and call that.