Samsung, bad Customer Service on Z fold. Telling a customer a warrantee has expired without even sending in the phone!!!!

I have been a loyal Samsung customer for 25 years and this is the first time I have encounter this kind of bad customer service. I have a Z fold that is 8 months old and what started as a white milky line in the middle is now a big black line through out fold and my screen is unresponsive. Feedback from Tyger Valley Samsung - there is a drop mark on the phone hence the warrantee expired. I DID NOT DROP MY PHONE WHEN THE SCREEN STARTED WITH THE MILKY WHITE LINE. NOR DID I DROP IT WHEN THE BLACK STRIPE STARTED APPEARING. Samsung did not even bother to book in the phone and investigate!!