Refixation of pay

Respected Sir, I joined PSU BHEL after completing 23 years of service from Indian Air Force.As per personnel manual of BHEL ex servicemen are eligible for pay Refixation. HR manual state that in case of ex servicemen their pay will be re-fixed as per government of India order,s on subject .But BHEL management is not taking any action on pay Refixation applications stating that there is no govt.of India order on pay Refixation of ex servicemen joining PSU.But our counter parts ex servicemen in PSU banks are getting pay Refixation.Is Government of India issue seprate order for different PSU ? Or DOPT policy reflects government of India policy on subject as indian bank association (IBA)and ministry of finance has issued letters to PSU banks on guidelines of DOPT .In such situations what are the legal remedy left with us .Please guide us .Why diffrent scale for ex servicemen in different Government PSU,s Thanks and regards, sanjay Kumar 9258472832