The air conditioning system for Viva is most likely from Sanden. They have a service center at Glenmarie.

I am not sure what normal service meant in your context, but I did a minor service at Sanden recently and it was less than RM 200. They refilled the gas, replace the receiver drier (as the old one was dirty), refill the compressor oil, clean the cabin air filter and replace one of the joint which was loose.

You should get a second opinion before repairing it.