1.  If you were not a management employee, then you can approach theed labour court challenging your termination.

2.  If there were to be any misconduct, the management should have served with you Notice for your misconduct and after the inquiry only, thesioner management should have taken appropriate action.

3.  Send a legal notice to the management to show cause as to why you were terminated without any proof of your under performance, misconduct, etc.

4.   Complain against your termination to the jurisdictional Labour Commissioner requesting his intervention in the matter to your advantage.

You can approach either the labor court with an application to set aside the termination order and to reinstate you since the management has act of terminating your service is illegal, against the law of the land and natural justice because you were not given a hearing before taking this drastic decision against you, provided your designation comes under labor law or you can  approach high court with a writ petition with the same pleadings 

Before taking a legal route, you may first send a representation in  writing to the top management venting out your grievances and for reinstatement, if there is no relief from the top management, then you can issue a legal notice to the employer through your lawyer which will give  an opportunity for the management to consider your case. 

If this also do not fetch the desired relief, you may resort to legal action through court as suggested above. 

File complaint against un lawful termination before the labour commissioner .take the plea that your services were terminated because you complained against the manager for mental harassment 

You need to challenge your termination and claim your dues

Dear client,

You have right to take release as it's affecting your mental peace and emotional well-being no one can force you don't ever compromise your mental health.There are numerous opportunities outside organization do just decide your goal and use the platform take required experience .

Hope this helps you.

- You can approach the Court after sending a legal notice in afresh.