Homeview camera issues and billing discrepancies

I have been there. My Telus security included a doorbell cam, a Garage Door Opener, and a Thermostat. With me all the components worked, it was the installer that was the problem. It took him 8hrs to install my garage door opener, my furnace he rendered non-working and when he did acknowledge that it was not working he tried to say it was already like that, it was summer and when I pointed out the air conditioned room he was in was getting hotter, he then put the old thermostat back and the furnace still didn't work. He told me I would need to contact a furnace place and get fixed and bill it to Telus. I was also told that the power source for the Doorbell didn't work, oddly he pushed the doorbell when he got there but it somehow wasn't working. I figured that perhaps the power source was not of the right wattage but he told me there was no power at all. So in the end my Furnace didn't work, and I had no doorbell at the end of the service, but hey my Garage door opener worked. I noticed after he left he had not put my doorbell back and my original doorbell was nowhere to be found. I pushed the wires back and my doorbell rang, hmmm.... seems like power to me. I installed the doorbell myself in minutes and low and behold it works. I next had a look at the furnace and it was dead, lucky for me my former neighbor was a furnace guy. I called him and he said there was a fuse on the motherboard likely blown and told me how to change it out. My Furnace now works. I had to do a bit of rewiring but I also got the Thermostat working properly annnnndddddd now Telus charges me for the service that I had to install myself. My point is maybe it is the people doing it.