Top Notch installer ripped me off

I had a bad experience with this company when I called them to repair an E48 error on my secondary TV on Friday 31May. While the secondary TV is working properly, yesterday the Primary TV has been showing the same error quote which showed on the secondary TV. When I talked to them they are giving me the run around after giving me an 18 month guarantee for their work. These are big ****mers and I want to alert management and the public out there