I was fired for reporting harassment - what are my options?

Three months ago I reported my manager for making inappropriate comments to female staff. HR said they would investigate. Two weeks later I was suddenly let go for performance issues that were never mentioned before. I have emails proving my performance was excellent. I feel like I was punished for speaking up. Other women in the office are now too scared to report anything. I want to fight this but I am also exhausted and need to find a new job. Has anyone successfully challenged a retaliatory firing? What did you do? I am in Tunis and need advice on the legal process here.