Restricted Neck Movement

I have been suffering from Psoriatic Spondylitis for last 5 years. The symptoms are excruciating. The neck movements are fully restricted. Cannot sleep on my back with head on the floor. No upward or down movement of neck possible. Does anyone have this kind of disability. Tried many treatments - allopathy/homeopathy/ayurveda/acupuncture etc. The relief comes only when I take pain killers. This worries me, affects my family/professsional life. Are there any permanant cure for this???