This is a violation of health codes laws (probably both state and local). You need to immediately have the request/demand in writing and indicate if all of your concerns are not handled by the landlords within 24 hours and at the landlord's cost, then you will need to a) force self-repair and deduct those costs from rent owed as you are allowed to do and b) file a complaint against the landlords/report the landlords to the state or local consumer protection bureau, especially the unit that handles slumlord criminal prosecution (which many states and cities and counties now have).