So, finally I have it fixed today! Went to a mechanic, he removed the water pump, spun it and it wasn't making much noise, so he serviced it, checked the compressor and it really was the culprit! Anyway, he recommended someone on Aziz Hotel road, Multan, and I went there, he removed the compressor and he managed to take the pulley off. I changed the complete pulley along with bearing which he took off from another compressor. It was smooth and working ok..
Total Cost: 3500 (including pulley, bearing, the other body, all in all the complete pulley set)
Compressor removal + Regassing: 2000
Now engine compartment is realllyyy quiet
Tomorrow: Complete engine tuning (except tappet adjustment)!