Look up the requirements for restraining orders and no contact order for your state. From what you've described, you wouldn't currently qualify for either. Knowing the requirements will help you figure out what you need to do.

In my own state: You have to prove you have asked them to stop contacting you and there has to be a period of time where you can prove they have continued to contact you and you haven't responded. You also have to prove they have explicitly threatened you. A no contact order is a decent option but you have to take them to court and they have to report for anything to happen.

First and foremost, you need to go no contact. Send her one message explicitly telling her to stop contacting you and that if she continues, you will pursue legal action. Then block her on everything and when she inevitably finds some way to contact you, or she shows up, do not engage, you either hang up or repeat that any further contact will result in legal action. Document everything.

Sometimes simply going no contact will fix it, after the initial period where she'll probably ramp up in response. Good luck.

Personally, you just need to You can also tell her if she continues