OnePlus India — Tv 50 inch u series fault

On Feb month 2022 I bought oneplus tv U series 50 inch. I was impressed by the product quality. But barely after one month's usage the TV started showing straight lines, so as I trusted the brand I raised a complaint expecting for the best service. But their engineer arrived and declared that the TV is damaged.And then that same night onwards the TV started working fine. But again after few days it started to show its true colors by showing the staright lines. Upon researching about the same TV, came to know that this particular TV has this sought of issues. Lots of customers have been cheated for the same. And the worst part is there's no customer service type of thing. Total ignorance. Below are the reviews from Amazon.
https://www.amazon.in/gp/customer-reviews/R329JOXORWP8NR/ref=cm_cr_getr_d_rvw_tt...⇄

Please take action against this company so that customers may not get cheated.