Termination from bank services without any notice & submission

Respected Sir/Madam, I have joined a private bank on 31/10/2012 as Deputy Manager in New Delhi, being promoted after two years at Manager-I. Recently in Oct’16, a fraud had happened in my branch. The Case is: 1. Four non operative dormant accounts were activated.{this can be done from BM and DBM Financial ID Only} 2. Emergency cheque book(Loose Cheque leave booklet) were issued in the accounts. 3. The entire amount present in the account is withdrawn through cash withdrawal from same cheques. 4. Regular cheque book request taken for all four accounts to be delivered in the branch. 5. Old currency cash deposit and cash withdrawal is done on all the accounts. In none of the case above my ID been utilized for any of the transaction. All the relevant documents for activation of dormant account, issuance of cheque book are not present in the branch. Also the cheques used for the transaction are also missing from the branch after the case came in the light. CCTV cameras were also not in working condition at the time of instance. The investigating officer {who is very junior in grade} is stating that some alphabet/letters on the cheques resembles with my handwritings. My non-financial ID{which can only be used to see the account details like address, birthday, balance and phone no.} had been used to see account details whenever the transaction been done. On these two grounds they had issued me a non-speaking order od Termination of my services on 20th April 2017. As per our rule book, they first need to issue me a written notice mentioning instances against me, then my written submission on the same. After the decision I can appeal to the appellant authority once, which I have done on 27th April 2017, which again got rejected with a non-speaking order. Now in this situation what should I do? Is this termination is valid as per law of natural justice? Can I file a writ application in high court for some relief or what relief I can get in my case? Please give me your valuable advice. Regards Rohit