Reach Air Conditioning & Htg

We operate 28 units of rental apartment. Reach installed all of our AC units after Hurricane Ivan. When I called them when one of our tenant's AC did not work, a guy came and fixed it, but informed me that was temporary fix. Another guy insisted to meet me to discuss options, so I went to the apartment but this guy did not know what was the problem. He asked me what was the problem. And he told me I have a bad compressor and I have to change entire 28 units of AC. He also told me it is my fault to install cheap AC. But Reach was the one installed those AC. When I called another company, the serviceman told me the compressor was perfectly ok. Besides, he told me if the compressor was bad, it is impossible to fix the bad compressor temporarily. When I asked Reach what they did to fix the bad compressor, no one answered my questions. I think that was the scheme to make us change entire 28 units of AC. By the way, the AC with supposedly bad compressor is still working after 8 months.