This is a private number that has been spoofed by a scammer. Scammers have been using personal numbers from Aus to get you to answer their calls. This person did not call you and is not responsible for the scam. Do not answer calls or return missed calls from numbers you don't recognise.

If they called but didn't leave a message it's either a wrong number or a waste of my time. I don't call back random numbers if I don't know them.