Yu Televentures — Yu4711 (2+8gb) no problem solve at time worst service yu/micromax

I am submit my phone on 20/01/2017 in m/s network for charging issue at power off condition and mobile automatically start when i plugged phone into charger. Service center says me your phone serviced in 10-15 days but now 30 days is gone and my device problem is not solve and when i call to the service center they said more time to solve the problem. Please solve my problem quickly.