WORST SERVICE EVER FROM SAMSUNG

I have a Samsung S21+, the screen just went blank, phone did not fall or anything, not even a scratch on the screen. There is a mark on the one corner of the phone as big as a pen's point, now Samsung say that the blank screen is not covered through warranty, they say the phone fell. PATHETIC!!!! Will think of ANY reason just not to cover the dead screen that just went BLANK!!!!!!! If lost total trust in the Samsung brand!!!!