Sony India — I am complaining about sony xperia m5 (handset)

Address:	Ghaziabad, Uttar Pradesh, 201009
Website:	support.sonymobile.com

I buy sony xperia m5 of rupees 35, 299 . on 10/10/2015 and getting some problem in it, It get switched off by its own many times after getting in contact of water due to rain but on the manual it is clearly given that this handset is water proof. I went to service centre (Aligarh ) and they said that your handset is not in under warranty but I have the bill of my handset with one year warranty.