Look at the AC pump. See if the belt is there, slipping, or the pully clutch engaging.
The center of the AC pully can be standing still while the outside turns. There is supposed to be a magnet that grabs the outside and locks it to the inside when you turn the AC on. The magnet could be bad or its clutch slipping.

Something like that ?? i suspect

It sounds belt related. i am not sure if this vehicle has a seperate belt for the ac compressor, but if so, it sounds possible that the compressor seized and tore the belt off. have a look