"MRI scan waiting time"

I had an appointment in February this year to see a physio, the reception staff and physio staff were all very helpful and welcoming, and the treatment I had at the start was first class, being sent for blood tests and a hip X-ray straight away to find out what is causing the hip/pelvic pain I have had for over a year now, it is affecting my work, I work with young children and I find using stairs painful. I was told I would need an MRI scan and appointments would come through in 6 weeks, after that time I rang up to be told it was now an 8-10 week wait as there was a big backlog of people needing scans which was fair enough, it is now 11 weeks and when I rang to find out if they know anything I was told the scan unit have no record of me being referred, paperwork got lost!! I have been told I have been referred again, how do I know I have been this time, is there a cancellation list I can go on to get an appointment sooner, am I now at the bottom of the pile.???