Civil defamation case

yes. You can proceed with correct evidential reports and can claim damages 

You are already stated to have been contesting your case, seek advise of the lawyer engaged / paid by you, who is well aware about the facts and circumstances of the case an able, comptent and intelligent enough to advise and proceed as deemed necessary.

If you have been contesting personally it is advisable to consult a local prudent lawyer for better appreciation of facts, professional guidance and necessary proceeding.

The auuthor has no where claimed having filed any case before any court of law rather has mentioned that he had filed a complaint with the labour Commissioner. Filing complaint is not a case and moreover, it can directy be filed by a victim.

Sufficient time has been wasted by you since the receipt of the copy of the enquiry report. You can definitely claim damages as the cause of termination of service turnished your image in the eyes of all concerned with you.

Facts, as posted, lacks clarity. Please post simple facts.