"Difficulty Contact Pain Management Clinic"

I have been trying to contact the Pain Management Clinic for the last couple of days to ask then if there is any chance of bringing my appointment with my Consultant and his team which is in mid October forward as the pain as got to a level that i am having trouble standing up correctly and is also affecting my sleep and walking. once the automated system answers and puts you in the queue i kept getting the message that all the staff are busy and i was number 0ne in the queue. after waiting in the queue for over 10 mins each time without getting through to someone. please could you advise me of the best way to contact them. P.S even thought i have not been yet i had to select a date i attended to leave the message