Illegal govt. Contract recruitment

I have applied an application(submitted biodata and xerox copy of qualification certificates directly to Med. Suptd.) to the post of staff nurse in contract basis at NIMHANS Bangalore. There was no notification for the post or in official website. I heard this vacancy from NIMHANS staff only. Now while enquiry from H.R Dept. they told they were already selected 10-12 candidates. There were no open exam or interview and selected candidates are known to nimhans employees or relatives only. I just want to know this kind of recruitment valid in a central govt. Autonomous insinstitution? They were not published selection list, offer letter directly handed over to candidates. How to get stay order for this recruitment and make the recruitment through proper way