LG Electronics — I purchased LG AC ,but not at all cooling from day 1 I requested to replace but no one are responding

I LENKALA VENKAT NARSIMHA REDDY,
I purchased LG A/C 1.5TON LS-Q18CNZD
ACLG116, ,
From Pai International Showroom Ramathapur-500013,
On date[protected],
But from day one after installation completed
Still now I'm facing no cooling effect
Many technicians visited and refilled gas thrice in 5months of purchase of product, you can understand that 3times they filled gas in short period, I asked both LG And Pai International To replace My product I can't satisfied with this kind of product, because now it's under warranty after 5months the warranty period will expire then who will be responsible for it continously facing problem
But their is no replacement you have to adjust with that product only we provide upto warranty after that we are not responsible for it they are saying, , Pai international Ramathapur guys are rudely saying you can do whatever you do no replacement will be done,
I'm requesting please Replace my LG AC, Immediately,
I'm much worried about dis product was