Game store Hisense warranty **** on smart TV's!!!!!!!!!!

I bought a Hisense smart TV 65Inch at Mall of the South Game the product was sold to me with a 4 year warranty sticker even on the box . Firstly Game Mall of the South closed down and i had to then have to search for a Game store that could assist me. I was eventually helped online and upon me trying to register the warranty i was told that its only a 3 year warranty on the tv and the customer has to register for the additional year. This was not how this product was sold to me and i have been told by the Hisense service center that its backlight issue that's a wear and tear item. Its very strange that a wear and tear item that's under warranty according to my knowledge due to the 4 year warranty that i have been sold would fail to work coincidently 2 weeks after the factory warranty that i am disputing. i have logged a call with Game online and want this matter resolved. The sales and warranty person in Game The Glen advised me when i was in store that they were only made aware on how the 4 year warranty works last year 2024 how is the customers supposed to know this if its not communicated to them?