Dahn A/C & Heating

Avoid Dahn AC at all costs, their contractor (one man shop, so the owner) refused to fix my equipment unless I agreed to do a bunch of unnecessary repairs.
Dahn AC came to fix my AC through a service request with American Home Shield. The technician came out and noticed my freon was low so he just added some freon and did no actual troubleshooting.
In just under two weeks the AC unit was non functional again.
Contractor comes out a second time and says I need a new evaporator coil. All of the freon that the contractor put into my system had leaked out.
On the way out from the second visit he tells me I need a bunch of unnecessary work. I tell him I am only interested in getting the unit back working. He Leaves with my AC unit in a state of disrepair.
I call the contractor the next Monday who now refuses to fix my issues since I will not agree to extra work. He will not return phone calls, will not provide prices for extra work he claims is essential.