I called back number 0457 083 640 rang once then gets disconnected automatically.

Spam caller named Loretta from Fawkner

Who's number is this?

Found this comment on whirlpool and it's accurate:
This group is cold calling people saying they are from the "National Rebate Initiative". They say that this is an Australian Government initiative.

FACT 1: There is no such initiative from the government.
FACT 2: There is no company or trading name registered with this name.

They will ask you for details of whether you are a homeowner under 60, and how much you earn.

DO NOT GIVE THEM YOUR DETAILS.

Keeps calling but hangs up - call back number to get "number disconnected"

Someone looking to "see if you're eligible for government rebates."