Caller: Unknown - unfamiliar interstate number so did not answer.

Likely a scam call. Listed as from South Australia but more likely a spoofed number used by an Indian call centre. Blocked and tagged.

Recorded message saying that my Amazon membership was due and that they were going to debit $99. If I pressed 1 I could talk to someone to cancel my membership. Too bad I don’t have a membership. Definitely a scam

Caller ID says it’s from Adelaide.
I didn’t pick up.
No voice message left.
Looked up number on this site - looks like at least 2 other people think this might be a scam number.
Blocked number.

Indian caller mentioned the 'recent deregulation of Australian Electricity market', and asked for name of my current electricity supplier. I hung up. Possible scam.