Scared to leave my partner

He was amazing at the start, but aren't they always?
I think now at least twice a month he tries to kill me, every day he calls me every horrible thing under the sun, he's set on destroying me, every time I try to leave he locks me in the house, if I try to call the police he hurts me, threatens me tells me he will find me. 
I don't have anyone or anything but him he made sure of it. 
I live in Australia.. Please any advice.. I can't do it anymore please..