"Appointment for day case"

Having had two texts and a letter for an appointment at eye clinic for cataract removal, I turned up at appointed time, receptionist didn’t take my letter from me just directed me to waiting room and said I would be called. Two hours later I was still waiting. I’m 85 with heart disease and was feeling anxious. I went to reception, they asked my name, the doctor came to tell me I wasn’t on his list, so the surgery couldn’t be done. l was upset and disappointed, I had been there two and half hours, shame they didn’t check my details on arrival, save me sitting there on my own, as my daughter had to leave as no parking available.