There is much more involved with having cold air than the compressor and charge. There are a zillion things in the climate control system that can prevent you from having cool air even if the refrigeration portion is charged and working properly.

I don't know how to do so on the 202 car, but you need to find out how to check for trouble codes in your climate control system. On the 210 car it can be done at the control panel by pressing a particular button sequence and read the code. A factory service CD would certainly be a good investment and give you the troubleshooting procedure for this issue.

Good luck,