BRIGMAN HEATING & AIR COND

He knowingly Installed damaged AC unit. that was several years ago. The indoor unit's automatic swing louvers stopped moving a couple of years after the installation. And the unit started making rattling noise while it's on. The front panel stopped sliding up when it's supposed slide up when unit is on. I told him about issue but he ignored it and never addressed the issue while they should have been fixed under warranty. also heating stopped working twice in 3 years. and had to call him to fix. and a week ago cooling stopped working and waited more than 10 days to have it fixed in hot summer weather. and gave us $170 repair bill for fixing the junk AC he installed. and when I questioned him that the unit breaks so often that I suspected it was bad unit when he initially installed. and he replied that "if you want i can undo the repair and you call someone else next time, d******", yes. he called me "d******". he lacks both professional skills and customer service skills. and I would not use his service again.