Dear Sarah, I can't give you any advice but I feel very much for you.
Did you try to reach out to your family? Do they really ignore their love for you and are loyal to these evil rules of the org in a strict way?
You are young, just in the beginning of your adult life. Things in life can change. Also the shunning of your family can change.
What if you just be especially loving to them and try to reach out to them or try to help them in some ways?
No matter what happens. You are a very courageous woman, worth to be highly respected and loved. I think your family will eventually realize this. At least they should be proud of you.
You will also experience a lot of joy and wonderful things in your life, I am sure about that.