Be careful sweetie, while you are trying to rescue her from hell, she may pull you in to the darkest place you have ever seen...I know because I've been there.
The only person who can save an addict is the addict themselves. Anything more than that is an illusion.
My son has been missing three years, and I make it through my days by saying a prayer and giving his life to God, then living the rest of my day in faith that he is in good hands.
Have you and your family tried any meetings? You might find they help you keep your balance and hang on to your sanity. They saved my life.
Prayers for all of you, it is painful to watch someone we love destroy their lives.
Hugs