If you can prove the landlord acted "in bad faith," then you should try to obtain triple the entire deposit. Realistically, though, I do not think that most Judges will award more than the amount of money that was wrongfully withheld. Hiring a company to file the paperwork probably is not recoverable. If your lease had an attorney's fees provision ,if you can prove you consulted with an attorney to help you prepare the lawsuit, then that money would also be recoverable.
Important things to remember: 1. The fact that I answered a question that you asked me on line, doesn't make me your lawyer. 2. Opinions are like noses--everyone has one. I just happen to think my opinions are right, but check with another lawyer too.