PSAT error or ambiguity?

My Son got the results from the test and one of the questions is wrong.
He called the CB people but they said if your encounter a test error you have to report that to the test supervisor…
It is too late for that.
Anybody tried to have a question corrected or cancell after the test is done?

what do you mean one of the questions is wrong? The answer that CB says is “correct”…which day did your son take the exam and what was the number of the question?

Did he sign up for the student service and see the actual question and answer choices? It is very rare that CB would make a mistake and not pull the question.