Laptop replacement request Dell Inspiron 5501

Hi I bought a laptop Dell Inspiron 5510 in colombo, Sri Lanka dell store in august 2022. After a few months i started getting a green line and red line on the corners. I have a two year warranty period. I gave the laptop for repair in July 2024. They kept the laptop for nearly 4 weeks. They Conveyed me through the phone call that they have requested for a part and will change the display but when i received it the laptop started showing pink lines.i have attached the image below. I have given for repair again. Please be kind enough to replace my laptop as i have spent too much on it and since i have requested it within the warranty period please replace the laptop as I am not satisfied with the repair and the Centre.