Wow, I am sorry. I don't know what to tell you. On one hand, she is an adult and she has to make and live with her decisions. Yes, diabetes is hard and it just freaking sucks sometimes, but if you want to live and be healthy, you have to do certain things. None of us asked for this, that's for sure, but many of us are able to do it.
I hate to say this, and I am NOT a profession counselor/therapist of ANY kind, but you may have to let her hit rock bottom before she changes her behavior. It may take going into DKA a couple of more times, it may be coming really close to dying. But it needs to come from within her. She's an adult and you can't manage her. You may have to be just that blunt with her.
Leave her the info and let her do with it what she wants. Give her the website and ways to access other support/resources...but she has to be the one who utilizes them.
She should also understand that high BGs are a viscous cycle...many people get nasty/depressed/angry when their BGs are high. And this can lead to poor care, which in turn leads to poor BG control.
Does she work? Go to school? How does being that high all the time impact the rest of her life?
In terms of getting her to come to this website, all you can do is leave her the info.
To be honest, if she's this out of control, a pump is not going to help, and it could even be dangerous. Pumping takes a lot of commitment, time, and attention to D management (more than MDIs). If she's not able to do this on MDI, I don't know if a pump is going to help things.