Complaints means complaint made following which Act? If the establishment did not have a Committee mandated by law to prevent harassment against women at work place, you can move against the company for that. If your issue is not harassment but termination, then the court is there to intervene and get your dues paid or reinstate you. But if you have been working in a supervisory role, you cannot get any protection Industrial Disputes Act- as such it is meaningless to go to court and battle against the company. After all, you were under probation. Termination as retaliation cannot be proved in the court. before the court the only question will be:
1. Was the employee under probation?
2. Whether there is a clause which permits the employer to terminate the employee on probation without notice and reasons?
3. Whether the order terminating the employee contains any reason for termination? if yes, is it stigatic?
In this circumstance, going strictly by law is not practical but you can explore the other options, approaching the District Collector or such other agency who is to ensure implementation of POSH..Act etc