My friend is in a problem

Hello sir/Madam. I have a friend & she is in a problem I need to give her a suggestion that what she needs to do. She is married to a navy officer 18 years ago. She told me that her husband is not staying with her from last few months. As she filed a police complaint against domestic violence. But since she complained nothing happened from police station. She is facing financial problems. As she said me, she came to know that her husband was having affair with some lady (I don't know the name). She was in depression and she made a mistake that even she involved in a affair with a guy. But after sometime she realized that she is doing the wrong thing. She tried to end her relationship but the guy started blackmailing her, she filed a police complaint against him. Few months later a anonymous person met with her husband and told everything. Her husband beaten her that night badly. And she told me that this was not the first time when he beat her. Now she wants to know that what is the correct procedure to file complaint and how she can file complaint in her husband's office. So that she can ask for interim maintenance and compensation if required. Please suggest me what should I tell her. Regards Ankur Srivastava