Micromax A114 — Phone suddenly hanged.

Address:	Gurgaon, Haryana
Website:	micromax mobile compliant

I bought a A114 .before 15 months. Now it suddenly hanged. But it shows display. I went to ur Authorized service center . They told that Mother board was failure. It takes the cost around rs.4000.I shocked. I bought it rs.9800.How it would be failure.?. Even though I used my mobile v. careful.So pls give me the extension of my warranty and change the spare one.