Hi,
I understand this type of dynamic, I saw it all the time with people escaping violence and abusive relationships when I worked in the field.
Firstly, its more of the same isn't it, but tinged with 'you've GOT to help me because I might DIE' and added to 'people will think you're HEARTLESS if you don't come to my aid!!'
In your position I would -
Deal with today's crisis by taking the info when it comes, being grey rock and getting away asap.
Then ignore as much as you can.
Then -
Longer term what do you want? To cut contact or minimise it?
When you know that, you can start to work to it.
It will mean 'they know' - you will have to behave differently and they will know that, so get used to the idea.
Get support if you can, even if it is writing in your journal about how anxious and guilty you feel, in the first few weeks of doing it.
Low contact looks like replying less and later, avoiding contact by ignoring calls and texting little back, not going to meet ups etc, and just letting weeks and months lapse.
No contact means ignoring absolutely everything, no matter what and from whom. If you take control by never ever responding, you will win in the end.
I chose no contact and it was the making of me. I did no contact for twenty years and now I have contact with certain family members and not others and it works for us.
I did a lot of self help to get me through BUT it was surprising how easy life then became, how low stress, much nicer and better all round, and no one else ever treated me like my mother did so it wasn't me.