NiMC: Wrong Disengagement From Service 

Good morning all. Please I need an advice concerning this issue; it has been bothering our family for a long time now. 

My father in-law has been working with National Identity Management Commission since 01-10-1987 as Clerical Officer II. Then it was Department of National Civic Registration. 

In August 2010 he was given approval by the management NIMC to undertake a part time degree programme in Psychology Department at Enugu State University of Science and Technology. 

Then August 15th 2020, he received disengagement letter from the commission on the ground that he did not possess a minimum requisite qualification of Bachelor Degree when he was already in the University in pursuit of Bachelor of Science Degree as approved. 
Fast forward to 2012/2013 academic session, he graduated with Second Class Honour (Upper Division) in Psychology same year he was disengaged. 

In a memo dated Tuesday 5th March 2019 from AGM/Head Human Capital Management Department NIMC. The management approved a period of five years grace to all the staff of the commission who do not possess a minimum requisite qualification of Bachelor degree to obtain same before 31st December 2023 which is the same approval given to him by the management.

My question is why is his own different? I have all the documents with me both photocopy and original.

Approval Letter to undertake part time programme
Bsc Result
Letter of disengagement 
Application for reinstatement 
Memo from AGM/Head Human Capital Management Department.

Please who should we write to? Who can help us out without asking for money? Which office or ministry should we channel our complaint to that will give us attention. 

#nairaland