When I answered no one responded. I hung up after 2nd hello.

Caller: Andrew about power bill

I answer and there was silent but background noise. I said who this and someone answered saying “it’s Andrew”.
He sounded Indian (maybe). I asked what their calling about and they said about your power bill. When I said I have no problems with my power Bill so no thanks”. Andrew got argumentative and started saying “I didn’t say there was something wrong with your power bill. Did I say there’s something wrong. Did I?”.
I hung up.
Not sure if he was just trying to keep me on the line for whatever reason but
100% a scam/hack/ or other call.

Caller: unknown

Called the number back and a recorded message advises the number has been disconnected due to suspected fraudulent activity.

Due to multiple daily spam calls I don’t answer my ph if not in contacts. This call rang for 5 rings & hung up without leaving VM

Sure enough another bunch of wankers who interrupt your day and upon your answering their call they disconnect, Robot calls a pest !

tried to return a call from this number (07) 3497 3235 but its already disconnected