NO Service and missed 20 minutes of the movie due to limited staff and services

We went early to view the Avengers End Game at Mall@Carnival in 3D the 21h30 show on 30 April 2019 , once we got their the line for popcorn and snacks was very long as expected, but there was NO one to assist anyone with tickets at the ticket stations nor at the reception area, I actually assisted 3 couples with the purchase of there tickets at the reception area because they did not know how to operate the computer and the individual manual systems were all off (All three of them were off), secondly the line moved super slowly due to the limited staff members assisting, not even a separate line for people that only wanted their 3D glasses, eventually time ran out and the movie started and we were only able to go into the movie almost half an hour after it started, at least 50% of the End Game clients were still in the line for popcorn and they started the movie anyway, and it was the last show of the evening. We missed about 20 important minutes of the movie! Just totally unacceptable. I've been looking forward to this movie for so long!