What kind of action can i take for a slumlord?

Contact your state's Attorney Generals Office - they will have the information that you need. The apartment has to be livable -proper heat, electric, water, structure soundness, etc. Parking would not be included - nor would a foreclosure interfere with it. However, fire alarms and heating oil would be necessary. She could file an action to recover rent - or to force the land lord to comply with the law.