"Appalling treatment"

I am extremely disappointed in how I've been treated by the staff.I have an impacted wisdom tooth which is broken and beyond decayed and is causing me pain.Had to spend Christmas at MRI because I developed an abcess due to infection.I was off work for a week because of this.I was given a surgery appointment for March 2017. I tried to get an earlier date and was told there were no appointments,was told to keep ringing up until they find cancellation.Today, I rang up at 9 am and asked if they had one, fortunately, they did.They told me to wait for 30 minutes and they'd call me to to make the new appointment,,they didn't.Instead, they called me at 2pm , and told me that the appointment date had now been taken by another patient whilst they were trying to book me in.They said the patient was on priority list(originally, they told me that they had no such thing as a waiting list) They also had told me earlier that cancellation s are on a first come first serve basis.I am now at risk of another infection and could potentially loose my job for being off sick.What a shocking service!