Late security deposit charge?

[Il-Hyung Cho]

Is there such thing as late security deposit fee?
Normally landlords would collect deposit before handing in keys, but it was Saturday when we arrived and they allowed me to move in.
Well, the apt was very dirty and some items were broken/missing. The landlord prmoised me to clean and fix those things, and they've done some cleaning/fixing, but not all the items they promised yet. Since then, I was not asked to pay for the deposit and I almost forgot about it, but lately the landlord found it out and charged me $100. They also charged me of late rental for October even though I paid on time. They did not provide me a receipt.

I shoud have asked for a receipt, but I personally handed over my check to the landord in their office before due, so I thought it was OK. But apparently not.
Even, they did not notified the late fee in direct words. My wife found it out in a print out that I brought from the landlord office.

Any adivice to resolve the issue?