Backlight Bleeding 75inch 8 Series QLED TV

Purchased a Samsung 75inch 8 series QLED TV in 2017. The television has been repaired three times already. First occasion, the TV just died. Technician replaced board. Next technician replaced screen. Now screen has backlight bleeding and Technician was sent out again to replace screen. No luck...still blacklight bleeding. Samsung now wants to send another technician to replace screen again. I expect Samsung to replace the TV because the product is bad. Considering I own several Samsung TVs including a 82 inch and a 75 inch TV...not to speak about the other samsung branded appliances and phone....I would have expected better customer service. They are wasting my time trying to fix a defective product.