Only 3% of domestic violence victims in Netherlands seek help from support agency / A serial domestic abuser was accepted into treatment in lieu of facing charges. With three sessions left, he stabbed his former partner to death / Domestic abuse specialists placed in 999 control rooms after women's murders / Domestic violence victims left open to attacks as restraining order breach prosecutions plummet for abusers / Minister urges domestic abuse victims to get support amid 'epidemic of violence' against women and girls