Samsung — LED TV screen turned half black

We had purchased 43inch LED TV in October 2019. Just 2 years after purchase the screen has not turned half black. The service technician says that we are beyond the warranty period so we will have to pay for the change of the screen which costs about 13200. This is not expected from a company like samsung that the screen goes bad within 2 years. The installation engineer had said that we have a 3 years warranty which the service engineer says is only of 1 year. Request you to resolve the issue at free of cost or minimum cost, at the earliest