why isnt my a/c taken any refrig?

Sounds like the compressor

Clear up which system you are dealing with please .Is the a/c your problem , or the cooling system? you make reference to both adding coolant -gauge is in the red and it doesn't sound like the compressor is turning on. well, if your engine is overheating then your a/c should stay off by default because it would only make the engine run hotter. Find out what's working and what's not and explain it clearly , then maybe we can do more than guess. thanks , good luck.