Micromax A114 Canvas 2.2 (Black) is not working properly after getting repaired two times in micromax service center

Micromax A114 Canvas 2.2 (Black) is not working properly after getting repaired two times. I have bought this hand set on :06-NOV-2014 by snapdeal.com.The seller name is PARKASH SALES CORPORATION

728-C, IST FLOOR, OLD DLF COLONY,

SEC 14, NEAR GANPATI HONDA SHOWROOM,

CITY GURGAON / STATE HARYANA.

It got repaired at micromax service center( viman nagar in front of pheniox mall pune 411004) two times. Still It is giving same problem. Please help me to replace the handset. Warranty of the product is one year.