Thing is, she told you before all this that she is apathetic, maybe aromantic and asexual. So were you trying to change her into something she is not? It's kind of like trying to date someone who tells you they prefer the same sex, and then trying to get them to change their entire sexual orientation, you know? Some things in people just cannot be changed, especially something that is fundamental.

I would let this person go. Don't contact her again, it would be harassing her at that point. But maybe think about your own motives here and what you were trying to accomplish with someone who told you these things about herself.