Just go through it but don't take it too seriously. I personally don't think her parents have any right to talk to you about any of it....they sound like meddlesome pains in the asses. You broke up, and the way in which it was done shouldn't really matter. It's not like you knocked her up and dumped her.
Regardless, be respectful and take it with a grain of salt.
I remember I broke up with my ex when I was 19 over the phone, when we got back together his Mom chewed me out. I'm still annoyed about it to this day. That was my first taste of what my potential in-laws could be like. Glad I got out.
Live as if you were to die tomorrow. Learn as if you were to live forever. - Mohandas Gandhi