Love. I HAVE been where you are, and actually one abuser is very much like another. So please listen, don't dismiss what I have to say because you're scared of doing something.
With respect, stop fucking "chatting" with all and sundry and start taking your life back.
Chatting to WA? Chatting to Samaritans, chatting on here?
None of this is putting you in a better environment, it's just one day longer with someone who could very well kill you.
Don't use the new phone. It could have a tracking or listening device.
"Chat" if you must with the police domestic violence team. You have dismissed them as "probably not going to help", but you have not tried.
Call WA and ask for help to get somewhere to go as soon as possible, no matter what. Stop just chatting and start asking for help to get out. Leave your mobile phone behind and get a new phone/sim. Call police and report the threats. Make an appointment with your gp and report the dv and the threats.
You can do this.
You have no choice, so don't waste another day on this pathetic, inferior, weak and sad little man.