I'm half siding with the op. The whole rsp should not be getting hammered here, but, if the tech on site agreed to do one thing, he shouldn't have done another. If the task was above and beyond standard installation, it should have been explained to the customer and as previously stated, maybe an agreement could have been reached, maybe not. I went to one install where the lady "didn't know you had to install a satellite dish" (honest to God), she didn't want a dish on her house/property so I cancelled, I didn't go slap a dish up and proceed.