I wouldn't even bother to call then and argue with them over cancelling your appointment. I wouldn't even waste my time calling to cancel because all they are going to do is send you to their winback department and give you 1001 reasons why you should not cancel, just like they just did by trying to tell you, that you can't cancel your appointment.
Just don't let them in your house if they show up at your door, and if they call you to confirm the appointment, tell them you want to cancel.
Bottom line, If they can't get in your house, then they can't install it. If they can't install it, then your not under a contract and they have to cancel the order.
Everybody here is making this out to be a BIGGER deal than it really is.
Simply call then back and tell them you changed your mind, since it's before the install date there should be no problem, no need to put holds on CC's or change cards and such.
If the installer does get out to the house before the cancel gets to him, which happens, simply tell them you changed your mind.
However, IF they send a installer out to your house, they
CAN charge you a
TRIP charge, if they decide to.
MOST installers will NOT charge the Trip Charge, and just move on.
But the company CAN charge you because they sent out a vehicle.