Incorrect movie schedule. Inconvenience

We wanted to go watch a movie called 'Breakthrough' on Tuesday, April 30 2019. We checked the nu metro website online and it said Key West was showing the movie at 17:45. Key West is a bit far from us, but we decided the movie will be worth the drive. We get to the cinema and we see on the schedule that the movie is indeed at 17:45. We try buy tickets and they tell us the movie is not showing on the system for the time that's displayed. We ask to speak to the manager, a kind lady by the name of Nothando. She tells us that there was a schedule change due to the fact that they decided to show 'Avengers: End Game' on two theatre rooms. This affected our movie. Why then did nu metro not update their website and save us the inconvenience?! I'm not impressed!