ok, so the laws around this stuff are a bit problematic. I would expect that you should be able to get her charged, or at very least an avo to stop further harassment.
By the sounds of things you really need to get away from her.
BTW - most normal right thinking people will see her sending stuff and evidence she is a nutter. Most of us, especially those with ex- partners have had a situation where things have gotten out of hand. That is why they're exes.
My advice - go to the cops, ask as them what would happen....
But I reckon you just wanna get the hell away from her.
Please tell me you don't have kids with her?