"ENT outpatient appointments"

I attended the ENT clinic at Lister on 21st August where I was told that I needed to have a scan and a follow up appointment for six weeks after the initial appointment on 21st August. I have had the scan but have received no appointment for the follow up. As it is now about a month since the first appointment, I have been trying for four days to get through to the ENT appointments department. I have been given four different numbers for supposedly a direct line to the appoints departmental, which I have been ringing at different times of the day. The phone either just rings with no answer or I get a recorded message. Perhaps I can have an answer as to the correct number to ring and why have I been given four. Different numbers to ring. Not impressed at all.