Low Cost Tenant Attorney

I am having issues with my property management. They are trying to charge me to clean the hallways because they think a trash bag I was carrying leaked in the hallways causing a smell. They have not provided me with any proof even after requesting it and say I need to pay the fees by the end of the month. I feel like they are discriminating against me. I am constantly see leasing agents walking up to my door then walking away. I am a new college student and don't have many help or resources here. Any help would be greatly appreciated!