Is it hiding of overqualification is crime in PSU.

My self ramakrishna, i am working in a public sector unit i.e psu which is belongs to government of india at hyderabad city telangana state. I was appointed on 18.05.2007 as a diploma trainee and got permanent on 18.05.2008 on background of diploma qualification. But i was having b.tech qualification before joining in government service. And also i given a declaration that " i don't have higher qualification e.i. b.tech or amie" at the time of joining in government service. Now i am compeleting service of 10years in PSU i got charge sheet from management mentioned in that " you have a higher qualification (over qualification) e.i b.tech completed before joining in this organisation, you given mis diclaration " on 05.10.2017 so now management started enquiry on me. Then i was approached all union leaders and some lawyers but no one ready to help me and giving me suggestion is that better to resign job. So my request is that: 1.Any possible to protect my present job? 2.Is it possible to terminate to me by management after permanent service of 10 years in organisation? 3.Is it hiding of overqualification is illegal or crime for government job? 4.Is their any gazzete, circular, notifications,guide lines or court judgments are available to protect my job from punishments giving by the management? Please answer me sir,because this is not only bread and butter, this government job is my life. Thankyou Ramakrishna amekittu@gmail.com.