I bought a iPhone 12 this week and see the display has yellow tint

I saw iPhone 12 demo model in showroom which had the right display with correct colour brightness and when I bought the same iPhone 12 model and after unbox I see my phone 12 as almost a different display with yellow tint background and in camera I see whole different colours which far from natural. When I asked the about the same to Apple service person he is giving whole different story that Apple started procuring 3 different shades of display from 3 different vendors and this is expected and any display can turn up in the box. What nonsense explanation is this, what I see in the demo model is what I should get. After paying hefty money if the phone is not given what is promised this is clear cheating.