Indian Air Force — GETTING LESS PENSION

I am MURALY MP Ex Sgt(Ser No:(682518G) Rad /Fit retired from IAF on Dec 2002, and my PPO No is 08/14/B/06067/2002. as per fifth pay commission I was awarded a pension of Rs/ 2463 .00 which was same like my subordinates who were retired on that time. Now after sixth pay commission and later one rank one pension revision My friends are getting more than me. I checked with one of my friend whose pension is in SBI getting 13636:00 where as I am getting 11812:00. When I checked with my Bank ( SBT MULANTHURUTHY) they were unable to help me as the pension is being credited by Airforce, Please take necessary action to rectify the mistake.