Late fee charges on rent

I live in HUD housing in the Town of Oyster Bay NY. I have lived in HUD housing for 6 years. My sole income is soc. security. It arrives in the middle of the month. The local HUD office had a cut off date of the 10th for late charges, in the lease. I have paid a couple of hundred dollars in late fees because I have no way of paying rent until I receive my soc. security. They have now changed the date to the 15th. Is there a legal date in NY that they can assess late charges? I want to know if I can recoop any of the late fees I have paid. I have tried contacting the NYS Attorney General and HUD in NYC and have received no return calls. Thank you for any advice