Motorola Mobile Phone — Defective handset recd (Sim slot damaged)

Address:

Gautam Buddh Nagar, Uttar Pradesh, 201301

I have purchased a moto g 3rd generation from flipcart a month back. its dual sim phone but i only use 1 sim slot for one month it worked wel, suddenly my phone showing msg of no sim card and it stopped working when i go to service center i come to know the both the sim slot of my phone was damaged, sim 1 that i am using 1 pin damaged & the 2 slot which i never used is totally damaged as their is no pin showing. i just want to know how it is possible when i never opened my phone or i never use 2nd sim slot. when i told this to service centre people or customer card they told me that its my fault that i have not checked both sim slots while purchasing the phone, this is the way they are talking, who will chk such a small things like this as i m not a mobile engineer i am just a ordinary person who have faith in motorola brand name but not now .i have purchased a defective phone in rs 13000/- now within a 1 and 1/2 months ur service center people demanding 1800/ to keep my phone in working condition without my mistake