If this is regarding Fresh Air Duct Cleaning, two threads you should read in their entirety:

http://800notes.com/Phone.aspx/1-(416) 222-2333/2#p154598824043980162

and

http://www.complaintsboard.com/complaints/bsr-enterprises-legal-toronto-canada-c199878.html

Billys air duct ckeaninh quit calling me every week for the last thtee months, I don't want your service and this is harassment !!!!!

I got a call from them today. I answered. They hung up. Can't wait to talk to them again.

If this is regarding Fresh Air Duct Cleaning, two threads you should read in their entirety:http://800notes.com/Phone.aspx/1-(416) 222-2333/2#p154598824043980162andhttp://www.complaintsboard.com/complaints/bsr-enterprises-legal-toronto-canada-c199878.html

Ok Alex... won't work since all these calls are phantom display numbers. This means they are not real phone numbers. They can put the call display number to anything thing they want. Reporting to the CRTC is pretty much a dead end unless you know for sure who the company name is, and their number is.
I caught one such company once by actually agreeing to getting my ducts cleaned, and waiting until they showed up to my house. I took the license plate down and told them I didn't order any service what so ever. Then I reported the license to the CRTC... Again that lead to nothing. The CRTC won't even investigate something that was a sure thing.
What I keep doing now is agreeing to their service, but they got clever and asked for payment up front now. I just keep telling them I don't give my credit card over the phone. Eventually one will agree to come out and so call clean before they get paid, and the next time I'll report to the police.

Stop calling, If I need work done I'll call myself.