When I answered they hung up , I tried calling back from my private number mobile I use for work but the call wouldn't even connect I'd say they have private call blocking activated no doubt scammers

Caller: Scammers

Fake call from “commonwealth bank”. I hung up before they could even try

Caller: Commonwealth bank

They called from commonwealth bank saying I had an $800 charge from America and asked if it was me when I said no they then transferred me to someone else that would cancel the charge and they wanted to upgrade my security on the banking app when I said no I’d rather do it myself they hung up