"Waiting for appointment"

A few months ago, I mistakenly went to the Victoria Hospital for a gynae appointment when I should have gone to Q. M. I had not read the letter carefully enough for which I accept full responsibility. It was an honest mistake.   A staff member at the former phoned Q. M. to try and persuade them to take me later but the request was not granted. Instead, Q. M. staff said that a new appointment would be sent to me. Stupidly I waited and waited for this to happen but it did not and last week I phoned to be told that my name had been removed from that day's list! I was therefore never going to be sent another appointment. Is it accepted practice  that an employee can arbitrarily take a patient's name off in such a way?   If so, it seems to me dangerous  as the potential patient could have a serious condition not hitherto discovered. Last week, I was told that a secretary would telephone me about the situation but I am still waiting! I really feel let down.