Unreliable Samsung galaxy Z flip 3

I am highly disappointed at Samsung South Africa . The service I got at first was excellent, but It was the product that let me down. I bought a Samsung galaxy Z flip 3 on September 2021,the phone worked fine for the first few months. The few times that I experienced a small problem, it was glitching and lines would appear across the screen. It wouldn't last so I didn't think I was a big deal. Untill early March 2022 when the phone suddenly stopped working.I was watching a movie than it stopped motion but the picture was still on.I Instinctly pressed the power botton to put the phone on sleep but it took a while to go off and before it finally went off the lines appeared across the screen again. I than took it to Samsung to get it fixed, so they booked it in to be accessed for damages. It came back with a quotation of R12 000 stating that the phone's LCD was damaged. They than said they will not fix the phone for me. I find it unfair that I have to pay 12k for a phone that had a fault from the Factory, if it had stopped working at my course I would understand. I am utterly disappointed and annoyed at that i still don't have a phone but I am still paying for it every month