Good, affordable mechanics/workshops in Kochi

I suspect a refrigerant leak in my car's AC system. I'm already convinced that there is a leak in the condenser coil but I want to check the entire system (especially the evaporator) for leaks since it is a 7 year old car. Please do suggest some good mechanics which won't try to scam me since I'm pretty sure the folks at Hyundai will pretty much try to rob me.. Thanks in advance.