These guys are telemarketers.
A few months back they called everyone from another 514 number and did the same thing.
If you want to see what happened the last time, go into Who Calls Me  and read this:
(514) 977-8989.. that will give you an idea how long it went on last time.

It went on for about 3 months, though, so don't expect it to end quickly.  
I make a habit of not answering calls if I don't know who is calling.
That's pretty much all you can do, because I remember that they didn't give up.
I got about 10 calls in 3 or 4 days last time.  They were all cell phones too.

Just don't answer.

Reporting to the RCMP fraudbusters  is good though.

they called but missed the call,called back and number was not in service.

I'm from Toronto, ON. Got a call from them just now and right after I heard "hello, you are the winner of ..." I hang up...

They're busy on the west coast right now - I just got the call too (Victoria, BC). didn't answer.

Got a call from this number on my cell, but missed it, 11:24 on February 25, 2010.  They left no message.  Called it back and got the same result as Sandy Webster-Worthy -- have no idea what they said as I don't speak anything but English.

Travel points. I pressed 1 and had to raise my voice to speak over the person who would not pause for breath. Told them to remove me from their call list.

These folks don't respect the Do Not Call list. They can call unlisted numbers because they just have a machine dial at random. It must suck to work in a place like that if you have any integrity whatsoever.