I took my diesel pick up to them to replace my heater core .while in there they also replaced my evaporator also

I took my diesel pick up to them to replace my heater core .while in there they also replaced my evaporator also. 2100.00 later I got my truck no heat or ac!they replace a 80.00 part 344.00 later.got it back no ac or heat.they said I need a new compressor.i.took it to another shop they said the compressor was OK. They said their was a hose not connected and a valve missing also the freon was low.theydidnt Seal up myair box either .it cost me 500.00 more which 27th refunded me !they charge 180.00 hr! They overcharge and do sub par service work ! Beware !