"Extremely disappointed"

I had a colonoscopy procedure done on 12/06/2014, the staff were extremely friendly and helpful. I thought like they couldn't do enough for you. I received a follow up appointment a week after for 11/09/2014, I wasn't to fussed that it was a while after my procedure as ive had other on going problems. I was then told that my appointment for this date had been cancelled and that my new appointment was 01/10/2014, a little bit annoyed but obviously I understand things happen. Monday I receieved another letter telling me that my appointment again had been cancelled (I got the letter 2 days before my appointment). My new appointment was rearranged for 17/12/2014, just over 6 months after my procedure. I am extremely dissapointed that I've been pushed around to acommodate for other people. This problem is still on going and I need to be seen. I've had 3 gynaecology appointments, major surgery with 6 weeks recovery and follow up gynaecology appointments all within the time I've been waiting for this one !!