"Extraction of wisdom tooth"

I went in Northwick Park Hospital, Maxillofacial And Oral Surgery Unit a couple of times because of my wisdom tooth. My dentist send me for an extraction. The staff was always really nice with me, but I have been waiting more than half an year for the extraction. I called to say I am in pain and I wanted to move my appointment earlier, but they refused. I guess there are many people waiting for the same procedure, but more than half an year waiting for extraction of wisdom tooth is too much! I was really upset so I did the extraction privately.