I was called and asked about my details. They knew my name and address.
They were telling me that, my gas meter is not compatible my service provider and they can help to find some other.
The guy who called me raised his voice when I keep asking questions from him, and this is clearly a sing of a scammer.

Caller: I don't know

They just keep calling over and over again. When I finally rang back they started talking about Energy Providers. I said I was with Origin and hung up. I think I will block this number.

Caller: Energy Australia

Credit department calling as their computer is telling them you are behind on your account payments. Of course, as humans, they don't know how to fix the computer and would rather tell you that you are not meeting your payments.

Called a couple of times, left no message. I’ve blocked and deleted number

Scamers