Amazon India — For not replacing mobile

Address:	Thane, Maharashtra, 400604
Website:	www.amazon.in

Sir,
I had buy the mobile (Nokia 105) from amazon on 11 September 2015.after four to five month the mobile is not working properly so I went to Microsoft mobile service center, they told me that this Mobil cannot be repaired instead of it will replaced from where you had buy this mobile, because this model is under replacement guarantied( on the box its clearly mentioned). so I contacted to amazon service center but they were asked for DOA letter.Again i did went to Microsoft service center, but they are denying to give DOA letter, because for this particular model the DOA(dead of arrival letter ) can not be generated.So amazon is fooling me.sir please help me.