I would fire her. If you trusted a mechanic to do something and he kept telling your brakes were faulty even though they seemed fine, charging you to fix them, then when you found out it was actually the tires he admits he never even looked at the brakes because his experience as a mechanic told him he didn't have to - would you ever think of returning to that person? This is your life she has in her hands and she is not in anyway helping yo. I would fire her with a call and not pay another cent for this "service"

I'm sorry you went through this and glad you are on a better path now.