Micromax — MICROMAX SMART MOBILE PHONE A290 (CANVAS KNIGHT CAMEY) is not working

Address:

Kanpur, Uttar Pradesh

I BAUGHT ONE MICROMAX SMART MOBILE PHONE A290 (CANVAS KNIGHT CAMEY) AFTER PURCHASING I FOUND THAT SIM SLOT IS NOT WORKING I GO THROUGH THE NEAREST SERVICE CENTRE WHERE HE RECOMMENED TO REPLACE THE SET(ISSUING DOA LETTER), AND SAID THIS IS DONE BY THAT SHOP WHERE I PURCHASE WHEN WE GO THAT SHOP THE SHOP OWNER IS SAID THAT PHONE IS REPLACING BY THE COMPANY IN 15-20DAYS THEN HE ABLE TO CHANGE IT. MICROMAX HELPLINE NO. CCHARGEBLE AND WHEN WE CONTACT TO HELP HIS REPRESENTATIVE ANSWERED THAT HE CCAN DO ANY MORE EVERY THING IS DONE BY DEALER. IN THIS CASE PL. HELP ME TO FIND OUT THE SOLUTION. WHAT I DO TO FOR OVERCOME BY THIS PROBLEM.