I suspect that they have Rogers cell phone list. Are you on Rogers?
I did not have this problem with Telus or Bell, but have had Debt Consolidation and other marketing type calls on my Rogers cellular.
There is a new Do Not Call list in Canada that may help. Don't know if it works for Cell phones, and may not work for calls originating outside Canada.
971-971-208-9936
Country: USA
Location: Oregon (Hillsboro, Beaverton, Gresham, Portland)
I answered my cell and some random person asked me if my name is Jane I said "you're looking for Jane?" and she said "No, I'm Jane are you the owner of this phone?" and then the call dropped. I was like wtf. So I called it back and it said the number you have called is unaligated.
So this is what I've found out, it seems that this phone number is one of many non existent phone numbers that some company sells to people to do whatever they want with. This can range from telemarketers and scam artists to stalkers and murderers. To keep in mind, people can track your phone call but you can't track theirs.