FIOS did something similar to me. My house is cabled for two services if I want. As part of my HOA I get free basic from a small provider.
Show Verizon tech my setup and tell him where I want his signal and where the other one will go.
I schedule the other co to come out and hook up. Get a call from the wife, they can't do the install since the Verizon guy buried all the cables behind his box and the other co can't touch it.
Call Verizon and explain the situation and what their tech had done wrong,
"is your service working?"
Yes.
"ok, it's a $75 charge to come out"

"well since it's working it's a chargeable call"
But your tech screwed up. He made the mistake that requires you to come back out. This is not something that I want done on a whim. The cabling was explained to him and he screwed it up.
"ok, I'll try to put it in as a credit..............................well looks like we can't do that, you are already receiving a credit for something else"
Yes I am, that was from something else that Verizon screwed up and the discount is to make it right.
"well we can't issue another credit with this one in place"
So Verizon only makes good on one mistake at a time
I eventually get them to schedule for no fee, the guy will be out on Dec 25th (2009).
So I ask are the techs REALLY working Christmas Day?
"yes"
Still waiting.