I have recently been getting unwanted marketing calls on my mobile and home phone.
I have told the caller (offshore call centre) to stop calling and asked where they obtained my details...their response was to call to mobile and home phone at the same time which is just plain harrassment!
Anyway....there is a "Do Not Call" register.
It's run by the Australian Communications and Media Authority. Their contact details are:
You can register mobiles and home numbers. I have just updated mine.
It doesn't stop all calls as there are some exclusions (charities etc) and it takes 30 days but it's worth the effort.
Their is a complaints process if you continue to receive the calls after the 30 day period.