Micromax canvas a120 — bad product and worst service by service center

Address:

Ghaziabad, Uttar Pradesh

sir, I have bought my micromax canvas 2 colors a120 one year ago.After 6 months there is problem of hangs in the handset .After 2 months the andoid version vanished from my mobile ie process, android, com stopped. and mobile couldn't be switched on.I took it to the service center the repaired it but after one month same problem started again i went to the service center "K S MOBILE PURANA BUS ADDA GHAZIABAD" and they repaired it .now after one month its again not switching onn and same problems are happening .What should I do? M_IMEI:[protected] S_IMEI:[protected]