Best Air Duct Installation in Plano TX

I've had two bad experiences with Enoch in the last two weeks:

1- I just paid thousands of dollars switching to a tankless water-heater. Enoch sent 1 employee for the complete install. After 12 hours of work the employee admitted he doesn't know why the system has bad water pressure and the next morning it took over 2 minutes for my kitchen sink to start to get warm water. I never had those problems before. I've tried reaching out and they are yet to respond. Last words to me were that I need to pay more to add a filter for hard water... something they never tested before the install. They are great at giving quotes and terrible at following through

2- I tried to get a quote on fixing airflow to my back bedroom. Two employees came and one of the young gentleman told me it's not even worth it for us to do this. I later received a quote for $8000 to completely change all my duct work. Another company quoted me $250 and said it was an easy fix

Tyler and Victor were great. Came in and took a look, gave me a quote and did a good job replacing valves and installing new faucet. Will definitely use them again.

Kirk air-conditioning messed up on repairing my AC unit recently. These guys did it right the first time. Thumbs up.

Force home services advertised drain unclogging for a certain price and i called to get an appointment. Was promised a certain time and i had to miss work to fit them in and an hour prior they call to say they need to reschedule for next week. I am not available next week so i requested them to come any other time today or tomorrow and first they said they do not have the time and then they said they cannot honor the price.
Very disappointing as i had not called anyone else and now i am left with a leaking drain , and not appointment. Terrible and will never call or trust them again. This is nothing but a scam!