This is a scam - they are pretending to be from Australian Hot Water Upgrades - a company that does not exist. I presume the goal is to get you to pay the $33 installation fee for a free hot water system and then extort you out of more money. The government scheme is real and they will point you to the NSW Gov't website. They have routed the call through a Sydney number however the call centre appears to be from overseas. Don't be fooled

Called and my phone said it was a Sydney based call so I answered but just got silence on the other end.
They called again later and i ignored the call and no message was left

(02) 9231 8486 (Sydney, New South Wales)
This number has been calling me constantly and not leaving voice messages. When I answer the call and don’t speak they just hang up.
Potential Scammer. Nuisance caller. Blocked number.

I got a call from this number, no voicemail left. Checked the number. Indications are it is a scam number. Beware!

Someone asking if I have solar panels

second day in a row from different numbers, they hung up before anything happened

I received a call from this number but the person didn’t leave the message

Nothing on the line just hung up

FLAGGED ON MY PHONE AS SUSPECTED SPAM ,so I declined the call & blocked the number

Called back number and it isn't connected.
f*ck off scammers, over it!

Called back. Did not say business name just that my call was very important and I'd be transferred to the next available agent

Caller: (02) 9231 8486

Missed call, they never left a voice message. I called back to a woman who gave her name then a how are you?
She never gave the company name. I hung up. And blocked.

be careful