In my experience CC staff are generally quite co-operative. You should only blast them if they are being obtuse and unhelpful. Otherwise you are just being a jerk for no reason.
Sometimes being polite and respecting the other person gets your work done much faster, and more importantly, to the satisfaction of both sides with no bitter taste in anyone's mouth.
When I called them, they immediately agreed to send a technician when I requested the same. Moreover, the technician without a peep agreed to change the modem for a new one, even though he didn't think the problem was in it.
OT: Can you change your screename, our_broadband_scene_sucks? It's loo long and indents the posts, and disrupts the flow of threads!