If the epidurals don't help, has your doctor tried facet injections or radiofrequency ablation (a procedure where they use a machine that burns the nerve so you don't feel the pain that much anymore). I have had both done and the ablation has done the most good. I have a disc bulge in my L3-L5 area and the epidural didn't do squat for me either. The facet injection helped more but the pain did come back. Finally the big guns...the ablation. I have my pain cut by about 3/4 and I can walk more than 5 minutes without nerve pain.
Ask your pain doc about the procedures. I don't know if you can do them in the cervical area or if they are offered in Australia, but it never hurts to ask your doc!
Welcome by the way to the board!