Motorola Mobility — Moto g 2nd gen. not working properly.

Address:

208009

I bought a moto g 2nd gen. recently and while receiving a call when i pull the slider, the call does not receive and the phone hangs. the person who was calling gets a message saying, "the no. you are trying to call is busy". this problem also occurred with some of my colleagues who had bought the phone through flipkart with me. all their handsets have been taken back by flipkart and their money refunded. so i request you to do the same with me. thank you