"Opthomology"

I had an appointment last month (24th Sep) which was cancelled with no reason given. Since then I have been trying to get another appointment as it is now over a year since my last check up as I have Glaucoma in one eye.I keep getting fobbed off with "we are trying to arrange more clinics and we will be in touch". I tried phoning the other day at 1230 hrs to try and get an appointment but despite being "You are No 1 in the queue" for 20 minutes and still nobody answered so I gave up. This is totally unacceptable and I am still awaiting another appointment Is there anyone there who can sort this mayhem out?