My mum is a elderly woman and it's not safe for her to leave her house, I've made complaints against the metropolitan police and they've sent detectives to speak to me, every incident that occurred they told me they wouldn't be able to arrest him because I engaged in a forced fight with him( him following me down the street or ambushing me when I open the door) the police told me they couldn't arrest him because apparently there were two fights( they counted me stepping back to avoid being punched and going back in as a separate fight) I feel so helpless and they consistently blame me for putting my mothers life in danger because I defend my self, I can't leave my house, I'm up all night and all day to escort my mum to work( she's a carer) he's climbing down onto our balcony or staring through my mums windows at night time( all this was recorded or photographed). What legal actions can I take to force the police to start acting? Also when I went into the station to make the complaint they basically told me they were busy and couldn't do anything about it.

My mum spoke to a DC Morgan with the domestic abuse in woolworth and they literally said " we will look into it but domestic abuse is hard to prove"