its a scam running from melbourne and optus has not bothered to take legal action to protect there customers....
I have had them ringing me once daily for the last 2 weeks and i have sent in a complaint with the exact times to optus telling them i am being harassed and they told me they will give there provider a warning or caution for misuse of there service or something, and they also gave me the option to block the number but id rather more harsh measures taken to get rid of parasites like these people, i have read on another website that if you answer "Yes", "ok" and other similar agreements they charge you extra on your mobile bill?

They tried ringing me - I never answered

This number has been calling me every day for the past week. Just thought they would get the hint & go away, no such luck. Spoke with Optus its not to do with them at all they said its all a scam so have now blooked the number i'm sure they will get the hint now :-)

I received a call from this number also, claiming to be optus. They were trying to give me free tv on my phone. I got a bit sus when they asked me for my D.o.b. I thought they would already have that info. So I told them I wasn't interested. I just had a missed call from them again, 3 days later.