Mitashi — Misguided by service engineer

I have some cooling problem in my refrigerator and i called a service engineer from mitashi. ha came and after observing 1 minute he said total expense to repair the refrigerator is 3500rs. he told me that it has gas leaked, filter and relay should be changed. i don't believe him so i called another service person. and he just charged 1000rs for the cooling problem. and mitashi service engineer charged 350rs visit charges which gone useless. he misguided me that and wants to make money. i strongly disappointed with his service.