Adjustment of Status - I-485

Hello everyone,
I am posting this thread, seeking information on how to move forward, after being in in an abusive relationship. August 2017 would be three years of marriage. Everything was going on well, until after my husband filed for adjustment of status. As it gets closer for the interview, the abuse get worse. I tried to hold on to the marriage, until he hit me twice in my face twice, almost knock me off my feet. I called the police, but he denied hitting me. He was warned. He laughed after the police left. I documented everything he did to me. He brings my phone to work, check all my messages, syncs my email to his, so he can see who is emailing me. He does not buy me clothes, if I buy food and spend certain amount of money he cussed me. Am tired of the distasteful names, such as trash, no good etc. My interview is scheduled for August 21, 2017 so sad, he plans to withdraw from the petition. He continues to send threats to my phone. I was not even aware that he placed a tracking device on my phone. I found out when I fled from the house. At one point, I felt like taking my life but a small voice told me to go away from his presence. All am getting is threats via email, if I don't return. I can't let him kill me. I can't disclosed everything on this site. Am about to seek legal representation.
Anyone has any information on how long the process would take to file I-360?? Your response will be greatly appreciated.