Kohler Heating & Air Conditioning

Last year I needed to replace my furnace because of a flood in my house. I wanted to buy from a local company. Kohler seemed to fit the bill. The owner is really nice. I bought the highest end unit I could get that would work in my house. Touchpad tstat, electronic air cleaner and high efficiency gas furnace. He assured me everything would work.
Thank God I was there during the installation. The duct work that needed to be resized wasnt. I had a zone damping system that wasn’t utilized. (I found out later as I’m reading the manual that my system would of worked with the zone system). I had them come back to tear out the old and replace with new as we agreed in writing. They even charged me more for that in the end. I have smaller vents and in the wrong places as discussed. I had a very difficult install and they didn’t come through. The basement is still too cold and middle floor too warm. Now they cant seem to get the a/​c unit to work. Something about my communicating tstat not communicating. They will have to talk to a tech and get back to me. I thought they were the tech???
There is now no power to the tstat since the tech? came out. At least before the fan was on to reciculate the cool basement air to the upper floors. Its over 80° inside now, which is great if in the middle of winter. They got paid a very handsome sum of $ and the job isnt complete. I wouldn’t be surprised if they wanted to sell me something else to fix whatever is going on. I would suggest going elsewhere for all but the simplest of heating or a/​c jobs. I will add more as this progresses.