ziox mobile bought from flipcart - ziox mobile is not repaired by the ziox mobile service centre bought from flipcart within warranty

I bought a Ziox Duopix F* (Blue, ** GB) from flipcart on *.*.** with order id OD******************. But from **.**.**** the mobile is restarting all the times so that I can not use it. Therefore I submit this to ziox mobile service centre in kolkata mobicare shivdas bhaduri lane kol-****** on **.**.**** but the mobile had not been repaired after four months.Surprisingly. there is no response from ziox mobile main centre also . Please take necessary and urgent step to resolve the issue. My mobile number is **********. ziox service centre of kolkata returns the product to me on **nd july,**** and said ziox main centre in delhi is closed therefore it has no option other than return the product. In this circumtances eighter flipcart returns back the full cost of the mobile or give me the repairing cost because the product is still is under warranty. you should take strong action against flipcart and ziox mobile as flipcart sponsores false and fake companies who close their offices after selling the products.