I HAVE PUT 4 CAN OF FREON 134 AND THE COMPRESSOR IS WORKING BUT IT IS NOT COLD

what size (oz.) cans and how much oil per can (if included) and do you know what the system capacity is?

I often see people add refrigerant to a system that has air trapped in it. Air can enter the low side if the system becomes low on refrigerant and goes into a vacuum . If this is the case, then it will not cool properly until all the air and moisture is removed from the system and charged with 100% refrigerant.. Air is a non-condensable gas and when trapped in the system will cause it to be inefficient. Also, if there is moisture in the system then it could likely turn into ice crystals and cause a restriction. If I were addressing this vehicle then the first thing I would do is to evacuate the system, pull at least a 30 minute vacuum then recharge with the proper amount of refrigerant. Only then can someone tell if there are any other problems through reading with a low side and high side gauge. Good luck, Chuck