OnePlus India — I changed display in april because display crashed for 11000 now after 4 months it got crashed now I didnt even drop my phone

Please help i cant to pay for display in 4 months.
I changed the display because i dropped it in april. I changed it in nearby shop.
Now same problem my display is flickering same issue. Repair shop said i cant claim warranty. I didnt even drop the phone.
This is worst i bought this phone for 30k i cant spend another 30k on same phone its not even 2years i bought this phone.
Kindly help me in servicing my phone display.
I really thought oneplus is a durable phone why is happening to me did i got the worst piece or company's all device are like this?
Please respond ASAP