Best Indoor Air Quality In Phoenix in Phoenix AZ

I have two units in my home with two thermostats. One unit was not working properly so I called Parker and Sons (May 16, 2022), and mentioned the overall problem and thermostat issue. The technician recommended various repairs that cost $2,074, which I paid. After the repairs it became obvious the problem was not fixed at all, I had the same problem. Parker and Sons came out again and we found out why $2,074 in repairs did not fix the problem. The problem was the thermostat not the recommended work. The new thermostat cost me another $200 after a managers discount. By the way I was assured by the technician that the Air Conditioner Unit that received the preventative repairs (that did not fix the problem I called Parker and Sons for), would work well for the foreseeable future. I asked him that question before I agree to pay for the service.This week on January 9, 2023 Parker and Sons made what they call a scheduled “maintenance call” that cost me $2,144.00 (including approximately $750.00 for two surge protectors), for a 3 year old air conditioner and the older unit that the technician on May 16, 2022. told me would be fine for the foreseeable future; after billing me $2,074 for repairs that did not solve the problem I called Parker and Sons for in the first place. Furthermore, the same technician advises in writing regarding the AC unit he repaired months (not years) ago in May 2022; “that repairs are discouraged due to system age, inefficiency and/or current overall condition”. This statement completely contradictory to what he said for repairs in made in May 2022 when I paid $2074 based on his recommendation. Then of course he offered me the opportunity to buy a new unit now, because prices are about to go up.As a person with no air conditioning experience and a senior citizen, I feel completely taken advantage of by the business practices I experienced with Parker and Sons. It appears that the maintenance program and service employees are really about upsales, employee bonus/sales commissions. Customers are not informed of the conflict of interest.I sent a communication to Parker and Sons directly about discussing and resolving this matter, and they did not respond.