Unfair apartment move out charges

I decided not to extend my lease and asked to apartment management for a move out notice. They told me it should be 60 days notice and my lease were ending 55 days later, and they forced me to write move out day 5 days later then my lease finish day. I said ok to pay rent for 5 more days even I’ll not be there. But after the move out I see that they charged me a 500$ month to month payment fee and plus 50$ month to month fee for first month (just 5 days). I think it should not be easy like that, can I do something about this? Please help me.