I'm so sorry you're going through all this-- I know how much kicking the codependent habit is so difficult!
I think you're on an amazing path, though, not answering her calls and putting some distance there. Be aware that the next opportunity she manages to get a hold of you, she will attempt to tear you down and project some of her issues onto you again. I had a bunch of that with my AXBF, who saw me getting better, happier, and ultimately more distant, and would take ANY opportunity to try and pull me down into misery again. I think it wasn't intentional, but a force of the addiction. Misery likes company, you know?
You're doing amazing.