Received a call from this number just before. Some lady saying she was from Telstra and could offer my company free calling to mobile and overseas... Sounded more like a scam

Yet another call today, at 12.10pm (just after midday)

Yet another call from this/these f wits.
This time to the landline.
Figured I would try to ring them back to give an earful!
It's engaged with no response other than the engaged noise.

Received another call yesterday .
Same scenario
You answer hello and a recording at the other end says "goodbye"

As for Bobs comment on April 19 2014 they keep ringing my mobile!

Probably the same a**holes who keep ringing me and then saying goodbye. I bet these mongrels are casing houses!!

This number just rang and I answered "hello" I said this three times.

It the said "Goodbye" and disconnected.