Who called from 4168501608

When I don't answer the phone, I get "hello, hello...hello,hello" on the phone.  I can't call the number back to get off the list.  It automatically hangs up.  I can't find it on reverse 411 or by googling.  How do I stop this?    I hate this.

It's these clowns:

http://toronto.en.craigslist.ca/tor/csr/2038482066.html

they tell me there from bell canada, but can't prove it

I also had a few calls from that number and it was a salesman of somekind with a spanish accent.. He even started to talk in spanish when i told him to leave me alone.. How can you report those people??