Tisha-When I saw this article, I thought of you:
https://blogs.psychcentral.com/stren...ure-isnt-easy/
It is so good that you are determined to stay away from these people for a really long time, but--
If there is a funeral in the future, you may want to reconsider (but don't help with the arrangements--this is an activity you can wash your hands from); funerals are supposed to help us reach closure. It is a memory of my mother's death that I will never forget and she was not alive during the proceeding to cause any stress. Funerals are very individual things, at least that was how I felt about it.
Eventually, one of your sisters will call, and, maybe still won't acknowledge what happened (just don't call her); I don't have any advice about this--use your gut as you say?
But I am really glad you told them how you feel; it may help you a lot.