Cinepolis India — Vignette problem at atmos screen

21st sept. 2:45 show. I am at pune, cinepolis, screen 3 atmos. It's screen in bright in the center and darker all over. I work as a colorist so i know how images are naturally supposed to look. It is probably a problem with projection. Please look in to this. It's ruining the visual experience. You can see things greeting darker as it moves from center to the sides