Apple India — Green screen

I bought iphone X in early 2019 . After one year some software glitch came and i raise complaint on apple support about green screen but it got fixed automatically the next day i dont know how . Now again it has started erupting again, the screen gets green from upper left corner and the camera quality becomes blurish and all the photos quality which are already in gallery becomes pathetic . This green screen gets away too sometimes . I dont know whether its a manufacturing defect or software issue . I HAVE SHOWED TO APPLE CARE TO AND EVEN THEY ARE NOT AWARE OF THIS PROBLEM. So what should i do please suggest apple company?????