Yep, I've been called by them twice around lunchtime in the past two days. Rang the number back and got a recorded message from Medibank Private.
Don't ever bother picking up this number.

I just had a missed call from this number too, I'm not going to bother calling back either, nor will I answer if they call again.

Have had the same problem the ring around 12pm each weekday

Similar to the (03) 8330 5100 number, this is some Medibank Private sales thing. I got called many times. If I answered, it would hang up. If I didn't answer, they'd just ring back later.

There's an auto-dialer that rings people and when you pick up, if you make a noise, it transfers you to one of their phone guys except that they clearly don't have enough phone guys so most people just end up having the system hang up on them.

We tried to talk to them on two occasions and they were incredibly rude, hanging up on us as soon as we expressed displeasure at what they were doing.

I have filed a complaint with Medibank. Everyone should do this to discourage them from using such bogus sales techniques.

http://www.medibank.com.au/About-Us/Contact-Us/Feedback-and-Complaints.aspx

Similar to the (03) 8330 5100 number, this is some Medibank Private sales thing. I got called many times. If I answered, it would hang up. If I didn't answer, they'd just ring back later.There's an auto-dialer that rings people and when you pick up, if you make a noise, it transfers you to one of their phone guys except that they clearly don't have enough phone guys so most people just end up having the system hang up on them.We tried to talk to them on two occasions and they were incredibly rude, hanging up on us as soon as we expressed displeasure at what they were doing.I have filed a complaint with Medibank. Everyone should do this to discourage them from using such bogus sales techniques.http://www.medibank.com.au/About-Us/Contact-Us/Feedback-and-Complaints.aspx

Just had a missed call from this number (03) 8330 3832, not going to bother calling back from the sounds of it!

I had the same problem, getting called numerous times.  When you call the number, it gives you a recorded message saying that Medibank Private tried to contact you recently in regard to their products and services.  It gives you a number to call if you'd like more information on that, and then disconnects.