"not even an apology"

Having parents of 90 and 87 years of age I have visited the hospital several times over the last couple of years. Every visit takes a minimum of 2 hrs but yesterday was unbelievable. My father had an appointment for a CT scan which resulted in him being seen late. Our total stay at the hospital was just over 4 hrs. I understand and rightly so that emergencies from A & E will take priority but I think this was just unreasonable. No apology was offered if we had known of the delay we could have got a coffee but we just sat there frightened to even use the toilet in case we missed being called. This is a step to far in my eyes. I have to go back on Friday to take my father & his appointment letter actually states we may be at the hospital for up to 3 hrs for the appointment. Dread to think what time we will actually leave there.