Depending on your specific goals and situation, filing a claim or lawsuit against an employer could result in reinstatement to a job that you have lost, receiving compensation for back pay or other such losses, and more.
Do not hesitate to pursue justice if you have strong and legitimate reason to believe that an employer has broken the law in some capacity. When employers who break the law are held accountable, they tend to be less likely to violate employment law in the future. By taking action against an employer for their wrongdoing you are protecting both current and future employees at the company from being victimized in the same way that you may have been.