Scum just wasting my time
Do yourself a favour block the number

Received 3 calls one per hour from the same number range (03) 8904 8892 /8893 /8896.

Blocked my number before calling back to find out what/who they are.
Heard a robotic message, decided to hangup.
Its highly likely to be SPAM or telemarketer or a con.

I missed the call and there was a voice message. In the voice message they ask me to hold, and put hold music on then come back saying "hello {my name}" repeatedly then hung up. Cannot find that number listed anywhere online.