Lenovo — lenovo ideapad 330s

Address:

Ranga Reddy, Andhra Pradesh, 500019

I bought a lenovo ideapad 330s just 6 months back. The laptop developed a black patch on the screen. I have been careful in handling my laptop and this black patch has appeared on the screen over night.

I called the customer service and they asked me to forward the pictures of the black patches.
Looking at the image they denied me a replacement of the screen.

How can two customers with the same issue be treated differently during the warranty period.

https://forums.lenovo.com/t5/Lenovo-IdeaPad-1xx-3xx-5xx-7xx/Ideapad-330s-15ARR-Blotches-on-screen/td-p/4586414

This customer's screen was replaced. How can i be denied the replacement.