Sony India — Replacement in new mobile phone

Address:

Gautam Buddh Nagar, Uttar Pradesh

I bought 2 new mobile on 2 july (Sony m4 aqua) and after one week I got problem in both the sets. One is getting switch off and another not ringing or giving alert sound. I got my one handset after 4-5 days. But one mobile is still there in your service center. I want to change my handset. Nobody giving a proper reply for the same. How can i change my mobile just tell me. Bcz both the mobiles are useless for me. I already using iphone and sumsung from last 2-3 years but not getting single problem in that. I didnt know sony is a big fraud and this type of cheap company. They gave us local phone in cost of 50000. plz change my phone or give my money back. Or tell me how can I register a complaint on sony. I am also related to IT company i[censored] will not give me reply. So I put the complaint on every facebook and social media pages.