An employee of a coop. society was reinstated by the order of the Labour court with continuity of service withoput backwages. His salary was brought to currency with service benefits. After four years, his salary was stopped arbitrarily presuming defects in pay fixation after reinstatement .A paltry sum much lesser than salary is being paid as pay advance for the last three years. The High court has dismissed the writ petition pointing out cooperative societiy is not a state entity and so not covered by writ jurisdiction. What is the remedy available to this injustice.