Got transfer order by one corrupt officer who got bribed from someone

Greetings of the Day!! I am working in PESCO Security from last six year . Pesco has assigned my duty with BBMB Chairman from last six year. In future approx six month BBMB will hire present security Employees as contract based. But Now Someone bribed the Pesco admin and he gave me transfer order to a Bank. So that after six month that person will be hired as contract based from BBMB instead of me.I have BBMB wriiten application regarding to Cancellation of my transfer order but Pesco admin give us curt reply because he have bribed. Is there any judicial way to get my position back because I have bbmb written letter in which they mention that I have not any complains regarding to my duty and they want same as person on duty. Pesco admin had declined there request. Is there any law regarding to this or any way to file case against pesco Admin Because they refuse to give me written reason for my transfer.I have gave six year for this position and now at end they spoiled it. Please help