I rang back from another service, received the following message;
The number you have called is not connected, please check the number before calling again.
Use your own discretion but I won't be answering calls from this number.

Caller: Some BS service

Hello this is NIcole from the Australian Broadband Network.
We have been trying to.....................

Didn't give the opportunity to continue.
Heard about this possible/probable scam from others, - not interested.

Another number (03) 2456 1118 called earlier, didn't answer that one at all.
If it's someone who wants me they know what my criterea is in order for me to return their call.
Checked both numbers on this service - No results found; for either number.
My apologies to those who want more information, I don't have the time today to play along with whoever they are.