There are many ways . You may use Silence the Powerful ritual from Gordon Winterfield’s book of Angels of Wrath. That will be extremely effective in your case.
Doll magick may be helpful as mentioned above. You may check here a video on how to do it, that will give you some ideas.
Another option might be the Vovins freeze spell, that will also do very well.
Also you may use a candle spell to bind her; you’ll need white or black candle ( or wax) , and Saturday is the best day, especially the waning moon period.
You have to molten the wax, please be extremely careful while doing so, you may want to use a double boiler and there are many videos on YouTube about that topic, please watch one or two before proceeding.
Once you molten the wax, juts add a pinch of frankincense, and stir it for eight times counterclockwise direction while visualizing this person being unable to do harm to you in any way.
You need something that represents the person you wish to bind—such as a photo, a personal object, anything —if you may not just write that person’s name or address on a
piece of paper. Visualize this person being unable to do harm to you in any way. Allow the wax to cool on the item, then complete the spell by wrapping the wax-encrusted item with a black ribbon or thread. Continue your visualization as you wrap.
That will do the job. Good luck 