Im not sure why in this situation you would not consult with an attorney to explore your legal options? Consulting with an attorney and at least initially engaging in a legal discourse with your previous employer is really not that expensive and many times if you have a viable case the legal costs are paid only by a successful settlement. Im not sure what she has to lose here besides seeing if she can get a lawyer to take it on contingency and time documenting the damages.
My honest guess is that IF she has documentation, having an attorney engage Uber would just result in some form of settlement to not have it go into court.