A/c Debaucle

I just bought a home, which has an old ICP rooftop a/c unit. It wasn't blowing hard or cold enough. I called "Air Supply Heating and Cooling" in Las Vegas, NV. They came out and diagnosed a bad motor, and replaced a 3/4 indoor motor kit, charged 750 tested it and left. This was about a month ago when it still wasn't too hot. Well now it's scorching, and my wife and I have had enough so we decided to turn on the a/c for the summer. Guess what? It is still not blowing hard or cold enough. Now "Air Supply" is scheduled to make another appearance tomorrow afternoon and I am hoping for my wallet not to get drained again. Any suggestions? Any important questions I need to ask? Help!!!
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May 15, 2012