Maybe just look at it as another reminder of how grateful you are that you were able to not only walk away, but run away, from her and her "broken ankle." The way I see it- I went no contact with my AXBF for a long time, and I still ran into him in the town we live in. This sent me into another spiral with him that I had to work hard to walk away from again, because quite frankly, I have to learn things the hard way.
I believe that whether you ran into her on the street or she called you, that you already have your mind made up about your decision and nothing she does really matters one way or another. She is like a child throwing a temper tantrum and hoping you will notice or do something.
Personally, I don't think it matters what you do with your phone number really. She will continue to try to get to you new phone number or not. Maybe threaten an RO or harassment charge or even better- just do nothing. It's so boring and predictable when they act like this, isn't it?
Hope all is well with you!