"the xray/gp appointment service"

After a visit to my gp on the afternoon of 20th October, he referred me to have xray of my knees. I rang the number given on the form at about 4. 15. I was told I was no 1 in the queue. I hung on until 4. 30 being regularly told I was no1 in the queue, then the line went dead. The following morning I rang at 8. 30 am to be told the line is very busy ring later. I called several times receiving the same message. Eventually at about 9. 30am I was told I. was no2 in the queue. I hung on untill about 9. 45 am when I managed to book an appointment. Why did I experience such difficulty, if I had been told I was 25th or more in the queue I would not have tried so frequently between 8. 30 and 9. 30. I would have left it until near 10. 0am