Our waiter was great and most of the food was good...

Our waiter was great and most of the food was good but two of us had items missing from our dishes. The GM came over and practically called us liars, as if we had eaten the missing items and then pretended they were missing. Completely unacceptable and unprofessional. Everyone makes mistakes, including their chefs so they need to own theirs and not treat customers like liars.