OP I'm not clear on what's going on here.
You were in a refuge and were supposed to get housed but the council messed you around on that and you lost the house, so you moved back in with your abuser.
If you need letters of support to get help, your GP can provide those for you. Has anyone told you your options here? Eg private renting, legal injunctions, gathering evidence etc
If you contact Victim Support, they can provide an advocate but you really need a dv specialist on the case either with local support services or an IDVA (independent domestic violence advocate).
It seems as though you are no longer deemed at risk and have been signed off from services.
Your options:
Go back to a refuge - if your life is at risk, which you seem to think it is, then a refuge is the best bet for you.
Get the council to help with housing as you are fleeing domestic abuse (you're right not to trust them. Many council's have gatekeepers to prevent you from getting the help you are entitled to). You can contact Shelter and ask what help you are entitled to but I understand that you feel frightened and vulnerable and not in the right headspace for that.
Find out what support is in your area. Do a search online: 'Domestic abuse help ....' put in where you live. You can also find out on your council website.
If there are limited services in your area, contact Victim Support: www.victimsupport.org.uk/help-and-support/get-help/support-near-you/
If your GP believe you are in danger, then she should also be able to refer you for services. She can also provide letters of support for the council and for benefits/legal help if you need them.
You also have legal options such as an occupation order to keep him away from the home if he is arrested or a DVPO (28 day police order to keep him away from you and the home).