Microsoft — Windows mobile

Address: Visakhapatnam, Andhra Pradesh, 530007

Website: www.Microsoft Windows live.com

My name is mohankumar, mobile. Model - nokia lumina 730 imei number: [protected]
Date of purchase - march 23, 2015
Actually, recently on march 14, 2016, i made a complaint and handed over my mobile to the store and they returned my mobile on 29 march, 2016. Again i faced the same problem which i had faced before. Again i sent my mobile to the with the same complaint on april 04, 2016.
Actually the complaint is my mobile is automatic ally switching off oftenly.
So after handing over my mobile to the store on april 04, they returned back my mobile on april 15, 3016.
And even they provided extra warranty for one month.
So, now i am facing the same complaint now and again i kept a complaint to the store, but now they r not accepting my complaint.
Five days had completed after giving the complaint.
Actually according to the extra warranty provided by the company will ends on may 15, 2016.
But they r not accepting my complaint.
This was the problem i am facing. I need immediate response from the respected regarding this problem.