Motorola Solutions — grievance regarding warranty

Address:

Kolkata, West Bengal, 700075

I bought a motog4 plus handset on 3rd november 2016 with the imei no [protected]. On 29th october the display of my motog4plus went all black an white jittery with rainbow dots. So, i went to the nearest service center (Anand international) on 1/11/2017 located at 233, diamond harbour road, kol-34 with the hope of getting my phone fixed. I didn't expect i will be asked to pay any amount as the warranty of my phone was still valid. At the center they told me i will have to pay 6.4k for getting the display fixed which is almost 50% of the phone's original price and they declared the warranty as void because of few dents and scratches on the outer rim of the phone. I am very saddened by this. With this i am attaching the bill the service center provided me with and the invoice of my phone. Please help me out.