"eye clinic 4th July"

My appointment was originally for Saturday, but was moved to Monday, 4th July at 11.15. We arrived to be told that there were few seats left, and that a delay of 1 - 1.5 hours was expected. We found a seat. At about 1pm the name of the consultant I was to see was erased from the notice board, but I was assured that "I would be seen". At 2.15pm a last ditch enquiry sent the receptionist into the mysterious hinterland and I was seen, but not by the consultant I had the appointment with originally. The outcome was fair, but did not include the possibility of laser treatment, which my GP had suggested was a possibility. Why does the NHS treat people in this way? It is surely not beyond good administration to match consultant availability with the time devoted to each patient, thus giving a reasonable flow of people through the clinic. This is 2016, not the 1950's. People deserve better.