My advice would be that if she would text you, you really don't have to respond to her text at all if you don't want to. But if you're worried that she might show up anyway even if you don't respond, I would try to communicate calmly yet clearly that you don't want her around because you find her behavior unacceptable. Based on her previous behavior it is possible that she won't react kindly to you setting this boundary, but this is also something you can (mentally) prepare yourself for. I hope this helps a bit.
Hi Kwamina,
Thanks for your thoughts. I'm thinking about not responding. I'm just thinking she will text me non-stop till she gets a reaction. I've thought about also setting that boundary. I just hate being put in that situation, like many of us with PBPDs.