I can't tell you not to pay. I'm not familiar with the laws of Philadelphia, but if you are living in the home and benefitting from the space, I would at minimum set money aside for the rent you may owe. If you spend the money elsewhere and find out you owe it, you could be in big trouble.
Is there a Tenants Union in Philly? Maybe a city, county or state office which can give you the information you need? Pursue this avenue rather than here, so you stay on the right side of things.
Philip J. Cunningham Sr.
Market Force Realty
801 W. Street Rd
Feasterville, PA 19153