I am married for four years having problem hisband beating me want talak but husband does not want to give

Khula is the right of a woman in Islam to seek a divorce or separation from her husband. A Muslim woman may petition a qadi to grant her divorce if the husband refuses. The waiting period (iddah) of a woman who seeks a divorce is one menstrual cycle or one month if she is post-menopause i.e. ceased menstruating. This is to ensure she is not pregnant. If the woman is pregnant, then the waiting period is until she gives birth. There is still the need for witnesses when seeking a khula as in a talaq.