download google chat , this is free call and you can call them hundred times from your computer. Your number will be listed as a California  resident. Let's make even with those CROOKS.

Keep track of all the numbers you are getting called from - make a list and then contact the Police and the Governments' DNCR - and report them.  It may be it is the same people calling - but using different numbers.  They are not unlike the computer hackers - but if you don't know who is calling you from the number if you have call display - don't answer it.  Make note as above.

How can these pricks get away with this?
I've had six calls in the last week, and I've duly filled out the CRTC's "Do Not Call" complaint form via their website six times ... but I've had to reply or indication that anything is being done.
I'm getting pissed off at the DNC registry too.

So what company or service are they representing?

These guys are trying to get around Canada's Do Not Call List.  Start making a list and report them - would be great to get a landmark case decided against these guys.

These idiots called my unlisted number.  The first time they called, no one was on the other end so I called the number back.  Got a recording saying I could leave a message and it was forwarding me.  Then I got another recording saying that the voice mail box was full.  The second time, there was a person on the other end.  It's a duct cleaning company.  I told them to remove my number from their list.  We'll see what happens.