Bought a used iphone but it still has the old line connected to it? What can I do?

I bough a used iphone from this woman in my area but can't activate it because she still has a line connected to the phone. She isn't returning any of my calls. What can I do?

Options are very limited. Sadly it sounds as if you were ripped off. Phone is likely stolen or reported lost and not the woman's who you bought it from. Apple won't touch it, the carrier won't touch; they don't do drama and fear you might in possession of stolen merchandise. Right now it's nothing more than an iPod unless you can find the original owner and make an arrangement. Best luck.