You'll have to take the landlord to small claims court, from the sound of it.  Your landlord might not have complied with the law, as far as an itemized statement of the damages;  even if the form of the statement is legal, you can still try to show that the charges themselves weren't proper.

Proof is important, because what you "know" doesn't count, it's what you can show with admissible evidence.  When you move into a new rental apartment or house, take a full set of pictures, of everything, burn a CD.  Do the same when you move out.  That way, you can prove what was and wasn't wrong with the place, and what was and wasn't your fault.