You would need to Lawyer up, the costs would be set by the lawyer. Each of them have their own costs for their services. You may even be able to get your case

You would need to Lawyer up, the costs would be set by the lawyer. Each of them have their own costs for their services. You may even be able to get your case or if it is multiple people that were unpaid class action done for free or low cost if you look around. Just a future suggestion for you in the future. If your employer doesn't pay on time even if it is the first time it is time to leave (from personal experience). The longer you stay the higher the wage and time losses will become. An employer should always have money set aside for payroll, payroll taxes and pay the employees first. If this is not possible it should be a hint to the employees that the business is failing and will eventually start bankruptcy proceedings or closing up shop. If your boss does not let you go before they are in this state as they know in well in advance before this ever occurs, it is an even worse sign that their pride and emotions are now running the business.