I'm not familiar with the specific laws of your state, but in NJ what they are doing is illegal, and I believe it is in most states. Again, unless they've had you unknowingly sign somewhere saying you agreed to those "aftermarket products and services", they have no right to force them upon you. If their PPF installer is very good, and you were going to do it anyway, then might be fine to take the car and not make waves, but in no way should you be forced to do something you don't want to without a fight.