[valrix]

You should be able to get a basic consultation with a lawyer, often for free, or a small sum ($20-50). It sounds like you're being jerked around a lot and they're trying to steamroller you into compliance. Keep refusing their attempts until they send you a check or credit to your bank account and keep everything they send you and you send them. The more evidence you have that they were not engaging in good faith, the better your case will be if it has to go to court.

If you're lucky though, a nasty letter from a lawyer will often make these business give in as they finally understand that you're serious about litigation. I've had to do such a thing when a commercial property company tried to charge me for damages that already existed, but I had pictures from when I moved in to show they were not caused by me, so it would have cost them more to take me to court than to ignore it and get a new lessee in.

Best of luck!