What can be done to help her in this situation?

This truly needs divine intervention. There is a karmic link here in need of healing and repair. This goes back to prior lifetimes on the part of both victim, and perpetrator. There is a karmic link here, and there is a karmic history, as well, that is one of being adversarial. This has carried over into the current life, and given the background and the proclivities of the doctor involved here. Such a grudge match carries great risk, because of his ability to mount an attack through third parties willing to do his bidding, and who are quite experienced in causing mischief without leaving evidence behind. The best that can be done is to do healing for both parties here, to quiet the karmic rumbling through healing the wounds, and to bring in a high level of healing attention, especially for the perpetrator, to soften the heart and allow things to quiet down. You have done some work in the past. There is more that is needed. Your latest Protocol version will be particularly helpful here, when applied to both parties. That would be the best first step, to do a Protocol session on your client and her persecutor.