When I was living in Red Deer my Shaw Cable would drop off quite often. I had countless techs out to my house to check strength, wires, run new lines (ect) None of this had fixed the problem until one of the shaw guys went into a wall and saw that a mouse or something had eaten though the wire and the warm/cold cycle caused it to turn on and off.
Needless to say that this was not a Shaw Cable problem, but they fixed it, and credited me like 6 months worth of interwebz.
And yes, I am still with Shaw and will always be with Shaw!!!