"Very poor appointments system"

I recently asked for an appointment to see a cataract specialist, making it clear I would be away from Sept 10-Oct 9, and was given an appointment for Saturday Oct 11, which was perfect. On my return from abroad, I found a message to say that the appointment had ben cancelled and for me to make a new one. I immediately phoned, to discover I had been given an appointment on October 4 (when I was away) and that since I had failed to turn up, I had been discharged. This is ridiculous. To bring an appointment forward without confirming with the patent, and then behave in such a high-handed fashion and unilaterally discharging the patient, is totally unacceptable. I was then told the next appointment would be in early December, also unacceptable. A so-called world-class hospital should be able to manage appointments more professionally