When you call back it says the number has been disconnected. Most likely a sales energy company. They don't leave voicemail either, so definitely a cold call sales call.

Just received a call from this number. They never leave message.
I just block them. I have suspicions it could be from electricity mob. I have told them heaps of times, I am not interested. Total pests.

Caller: Telemarketer/scam likely

Caller read out script. I was passed to someone higher up.
'Energy Australia'
wanted my address and details from an energy bill.
It was clearly a scam.

Very likely they were going to try to get me to give my bank details so they could steal money.