Unfair Warranty Rejection for Known Samsung Galaxy Z Flip 5 Issue

I am writing to express my frustration and disappointment with Samsung and their repair service regarding my Samsung Galaxy Z Flip 5. Despite the phone still being under warranty, my claim was unjustly rejected and claimed as warranty voided. The issue began when I noticed a green line along the folding area of the screen and the bottom half turning yellow. These problems are well-documented as common defects in the Galaxy Z Flip series. However, when I sent the device for repair, the service centre refused to honor the warranty, claiming it was due to "physical damage." This is simply not true, as there is no external damage to the phone, and the issues clearly stem from manufacturing flaws. Even when the device was handed in it was noted on the document no signs of physical damage (I have a copy of this document) so why the massive change? I was quoted over R7k to have it repaired and that is just ridiculous. The service centre booked was Technologia repair but guess what this is infact Bolttech repair and not what was provided by Samsung. To add insult to injury, I was charged a R230 quote rejection fee, leaving me without a functional phone and out of pocket. This feels like an attempt to sidestep responsibility for a known defect. Samsung, I expect better from a brand of your stature. I request a full refund of the R230 fee and immediate repair or replacement of my Galaxy Z Flip 5 under warranty. It is unacceptable to push the cost of a known issue onto your customers. The reference number of the repair is ***.. I hope this matter will be resolved promptly and fairly. Otherwise, I will have no choice but to escalate my complaint further.