I called back the number (03) 7005 2375 and reached vm that said I reached Energy Watch

Caller: (03) 7005 2375

and also (03) 7005 2384
both numbers blocked now, so we'll see what's next

Several calls over the last few days. Nobody on the line if I answer. Also on (03) 7005 2384

I’ve had so many calls from this mob always using slightly different numbers but searches always show other people saying the same company. Each time I block them they use a new number with only the last 4 digits changed.

got a call couple of times no one speaks on the other side

Company by the name of Energy Watch