Ill health, fitness to work and ESA issues

hi.i am michael.i was on incapacity benefit 2011 till they changed over my benefit to E.S.A.and it is contribution based E.S.A.i was forced in chronic pain to sign on after having an assessment that redeemed me fit for work.i then decided to appeal against there decision that took over a year.i was successful and won my appeal as i am limited to walking and breathlessness.the D.W.P.said i should not be signing on and then put me back on E.S.A.that changed over from incapacity benefit to employment and support allowance.i have all my paperwork explaining my esa contribution based and the change from incapacity benefit to E.S.A.allowance so please tell me am i a disabled claimant in line for backdated refund payment that i have lost out on through the dwp error of judgement  yes health comes before any amount of money so please can you answer my question as its playing on my mind due to my failing and ill health / with thanks