Pointless calling them
Last year I was not feeling well and I called to get an appointment. All the appointments had gone just after 8am. Eventually I got one and was told to wait until after hours. They had system issues and when I arrived they said I could not be seen and it was out of hours for appointments so I refused as it was their error. They eventually apologised but because of this experience I don't feel any need to call because it is pointless.