You need to grey rock until you can move out. Put your energy into your plans to move out, not trying to make her understand how abusive she is. That was pointless I'm afraid.
Your mother is toxic and not rational, and to be honest sounds barking mad, so you can't expect to have rational, nprmal conversations with her. She is never going to be in the wrong and you are never going to be right.
Nod and say yes where you have to, but disengage as much as you can. Spend your time out of the house as much as possible. Local libraries are great, free, spaces where you can job hunt in peace. Don't involve her, don't tell her anything, don't argue with her. Set up a new email account and don't access it on your laptop, use the one's at the library. Make sure you never let your mobile put of your hand. Sleep with it under your pillow. Do you have anyone you can get your mail redirectred to? If not, mailboxes are cheep. Don't engage with anyone who might pass on information. Grey rock anyone associated with her.
There is light at the end of the tunnel, you just need to focus on that and move forward.
When you do find work, and i strongly recommend any shite live in job so you can escape as quickly as possible, make sure you take everything important with you. Bin anything you can't take so she can't hold it hostage.
Once you are out, you need to consider NC and counselling.
Treat this like a military operation. A very SECRET military operation!! You can do this. You can be free and happy!