MJ Air Conditioner

Hi All, last year I bought blue star BI-3HW18AATU. after around 1.5 years of usage, suddenly cooling level is decreased. it took more than 3 hours time to cool the 10*10 room. I googled it and after few suggestions i thought that, my AC had suffering gas problem. then one of my friends suggested this store. i told him that, gas leakage problem and i want to change gas. i already checked the price to change gas. it may cost around 2.5k as per some reviewers. but he checked something and told me genuinely, only dusts are blocked and it was not gas leakage. he done the needful and he collect only 350. he would fooled me with lies, and he would pretend to change gas and he would have collect me 4k. but he didn't do that. he was nice and loyal. best service with reasonable price. i personally have his mobile number. whenever me or my friends and colleagues has any electronic gadgets like A.C , fridge, washing machine, etc problems i will suggest them shiek.