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.
I agree, but I have had times where trying to cancel something is more headach than its worth.
I tried to cancel Directv and it was an hour on the phone with Winback, I did the same thing with Vonage and it took me 2 hours before they finally transfered me to the right department.
Sometimes its easier not to pay these companies and wait for a final bill, then to deal with the crap.
As far as charging a "Trip" charge, I run into this all the time I will tell you its impossible to charge a customer a "Trip" charge because they simply will not pay it, and its not worth collecting.
The only way you can enforce the collection of a trip charge is next time your back out at the customers home. In the case of a new connect, its impossible to collect because they will simply place a new order through someone else.
You can usually collect on a trouble call by refusing to service the customer if they do not pay for the trip charge from last time, but you need to clearly document that you went out the customers home. You need to be at the customers home within the schedule period, put a door hanger on their door, attempt to call the customer, and then wait about 10-15 minutes infront of their home.