Tcl India — TCL TV 65 Display malfunction

There is something wrong with my TCL TV. Model number - 65P8E with 3 years warranty.
Purchased on[protected] from Proton Ventures Rajajinagar, Bangaluru 560010.

After purchasing the TV, the TV started Glitching and the screen kept going completely blank after 2 months and we registered a complaint. A person was sent to resolve the issue and luckily, it was working again. After 6 months the TV again started showing lines and a small blank space. Upon which I again registered a complaint and a person was sent to inspect.
The manager informed me that the TV panel / screen is broken on the Inside and had to be replace. And it will not come under warranty and that I have to pay 80% of my TV cost to get it repaired.

My complaint is that when the default is on your side, the TV that was sold to us had issues from the beginning and there is not even a single scratch on our TV and I possess all the digital evidence of the malfunctioning from the beginning and even though I have a warranty, why should I pay such a huge amount?