OnePlus India — Screen Damage and automatic damage

Address:

591, vinay nagar, Agwanpur Village, FARIDABAD-121013, Haryana

Firstly the screen was fluctuating and then after some days, when I cleaned the screen with cloth then after switching on the TV, the lines appeared and nothing is working. The TV is shut down and only 5, 6 months had been passed since the bought. I have contacted the service man and he is asking for 18000 to change the screen and making excuses. My TV is in warranty period plus I have also extended it's warranty for 3 years at 1699 at the time of purchasing. I want my TV to be repaired in 2, 3 working Days.