Just got a call from this number, I could't pick it up. When I tried calling back I got  "number does not exists" message

this number (416) 360-1550 claims to be from Bell Canada. I asked them if he was working for bell, but he said he is calling on behalf of bell. Behalf is not the same as directly working for bell. but anyways, I told him i got rogers for hi speed and cell phone but they guy was trying to sell me bell. bell customer service is not good.

They just called me saying they were from Windows telling me that my computer is being hacked.  Bologna!

Someone claimed they were form a company whose name I cannot remember, and that I was entered into a draw to win $25 000 and a car. The woman knew my name and asked me what year I was born. I had suspected that something was up, so I just said a random year. She then proceeded to ask me for my American Express number. I have never had an American Express, but I told her that mine was no longer in use, as I had cut it up. The woman quickly ended the conversation after that.

Just got a blank call from this number. There was nobody on the other side of the line. When I tried calling back I got a "number does not exists" message

Sounds like a fax machine calling. But no clue who it is.