A woman asking for divorce because of herhusband’s addiction

A sister's husband became addicted to crack cocaine, and he beat her badly, threw a knife at her and tried to kill her, and abandoned her for four months. She requested a khula from the Imaam of the community and even though everyone could see how badly she was beaten (scars, bruises) and that her husband was no longer home, the Imaam refused to nullify the contract unless the wife drew up a written summary on paper of why she wanted a khula, which as she puts it "is long as a book." She refused to write it, and she did not get divorced. And as the weeks passed, it became apparent that the Imaam (who is a part of the bid'ah of giving bay'ah) was incompetant and handled the situation badly. Her husband rehabbed himself, and came home, and she accepted him back, and months later, his addiction came up again and he left weeks ago. She now wants a khula again, but she does not know what to do.  Please Advice.