Are you surprised? After SA continued doing business with Russia after much of the west had imposed sanctions this type of inconvenience is expected. It's petty and exactly the type of thing delegates are used to
Yeah the fact that SA doesn't agree with the west politically totally justifies holding their delegation hostage. Thank you for your insightful comment.
edit: presumably downvoters think it's normal behavior for countries to do this sort of thing, if this is the way the west is going to keep acting on the world stage then life is going to get very hard for westerners