So these people are trying to contact you.
At least it means that they care about you. Even if it's in their own twisted way, they still care.
Would you really rather have them ignore you, post discard, as if you never existed?
I don't think so.
Does a borderline really care NCEA, or is a borderline feeling abandoned by an attachment, or abandoned in general, the worst thing that can happen to someone with the disorder, and is flailing against an emotion they can't soothe and turning on all the attachment skills they have to reattach, to use an attachment as a soother? Everyone's different and you know her, and it can be helpful to discover the motivation behind the behavior.
And then, moving forward, as we create the life of our dreams, part of which includes populating it with empowering people and removing the disempowering ones, it's helpful to realize the relationship ended for a reason, or several; either we had had enough and left, or we got dumped, in either case, is our borderline ex someone we would want in the life of our dreams, someone we want to make room for in it? And I mentioned dreams, not fantasies, so although we may want the idealized version of our exes in our lives, the ones who showed up in the idealization phase, that proved to be unsustainable and the whole relationship was based on fantasy in many cases, so as we create that life of our dreams, it's also helpful to look at our part in the creation of a fantasy, learn and grow from it, and stay grounded in dreams and goals moving forward. It's a brand new world!