1999 Honda Civic

1999 Honda Civic

the ac compressor wood stall the car when I turned it on and the mechanics replaced the comp, r/d evaporater and flushed the system and the comp cycles normal but almost stalls the car and the low side pressure is maxxed and the hi side is a little higher that normal (around 300psi). What do I need to do to get ac that wont kill the car and put a stop to this increasing bill now at over 1000 dollars