Business ProfileforECO Heating and Cooling, LLC

I am writing about the subpar business practices of ECO Heating and Cooling. Earlier in the month, I contacted ECO Heating and Cooling for a second opinion about replacing an A/C unit at my place of business. A different A/C company had stated nothing could be done to repair the unit. The ECO Heating and Cooling technician examined the unit and stated that while the unit was old it just needed freon and it should continue to function. I was thrilled to hear that and approved the work. Costing $440. Another unit of mine was malfunctioning at the time, and I asked for help with that unit. Again, the stated problem was with *****. I approved the work at another $400. I additionally offered more work in the form of preventative maintenance on 4 other units at the cost of $400.To make a long story short. None of the maintenance remedied the problems. Neither unit performed as the technician stated they would. The first unit was eventually replaced. A technician (the one that stated the unit needed replacing originally) stated that filling the unit with freon was inappropriate as the problem with the unit would have been evident had ECO Heating and Cooling conducted the proper diagnosis.The second unit that ECO Heating and Cooling performed maintenance on did not work correctly either. The original technician replaced the capacitor and had to reduce the amount of freon in the 2nd unit, because it had been over-pressurized by ECO Heating and Cooling, for the unit to operate correctly. To date I have paid the preventative maintenance fee of $400, although I have reservations. I have asked ECO Heating and Cooling, via email, on two occasions to reconsider the remaining bill of approximately $840. I submit that the bill is inappropriate due to a lack of correct diagnosis and no difference in functionality after maintenance. I am struggling to understand what "services" I am being billed for at this time.