I have used all of those with no luck as well, I have been on an 80 mg per day dose of Protonix for about a year, and while I am still symptomatic, alot to do with the stomach disease I have, it does help. It is double the normal 40 mg a day but it is worth the small amount of relieve that it does offer.
I don't know if what helped me, will help you, but this is what I did to help my reflux problem.
I ate only rice, chicken, pork, bananas, and drank only water until my symptoms started to go away. I slept with my head raised and listened to my bodys signals as often as I could. I layed down when I was tired and so on... In about a month I was 80 % better. The meds started keeping the acid pain away and I could start splitting my 40mg pills in half after a while. About 3 months later I came off and only take them when I feel the acid coming back.
What kind of pains are you having? I have reflux, with no heartburn, but my side and back hurt sometimes.