Being attacked by lesser entities is a very common problem… The standard practice for this is a banishing and to set up wards to drive the unwanted entity away, and prevent it from being able to get to you.
Treat it as a regular “parasite” as I call them, basically… we have a bunch of tutorials with more information here, but also search the forum for something more specific:
It doesn’t really matter who sends you what when you are strong and can hold your own.
But if you still have problems I would go with a binding on her, or anyone working against you. Try the banishings and cleansings first: deal with the immediate problem then fix the cause.