Lava Mobiles — Non attending of complaint of handset under warranty

I purchased a mobile hand set model atom (N) bearing imei _1 :[protected]
Imei_2:[protected]
On dated 24.5.16 from dhamija communication yamuna nagar but since purchase the hand set giving frequent problems and not woking properly. I contact so many times at your service center at nehru park market yamuna nagar but all in vain. The hand set is still under warranty please provide the replacement as i faced a lot of ppromlems