How exactly did your finger and knee damage her car?
What dents, have you seen photographs, several quotations to fix the dents?
I think had the car hit you hard enough to get dented your leg would be broken.
As a pedestrian you will not be insured and you are liable for damages as you failed to check before stepping out allegedly causing loss to her.
I do not see how the wing can be dented and the wing mirror come off.
Stick to your position of requiring photographs of the alleged damage and estimates for repair. You can ask to view the vehicle to see the damage as it may show that it is old damage.
In my experience if she was slowly down and you only suffered a grazed knee I cannot see how her car got this damaged