Where to go next

I am 21 and my brother is 17. My BPD mom kicked us to the curb (to our father) after the divorce 3 years ago. We have been trying to get our stuff from her house for over a year and she won’t relent. She is constantly accusing me of visiting the neighbors and not her, which I do, but I knock on her door EVERY TIME. In case she wants to see me. And she never opens.

I’m about to move into an apartment by myself and I want my stuff, and brother needs his too. I don’t know what to do at this point, she has my grandparents rapped around her finger.

My father suggested texting and calling her everyday till she cracks, but she always doesn’t respond to me to begin with.

He also said small claims court, but is that even feasible? She made us change our legal address from her house months ago. And even with the divorce she proved she doesn’t give a damn about legal repercussions. And then also my grandparents will flip out at me.

I just want my stuff so I can move on. Those things were my childhood and mean a lot to me, and god knows if she even still has them.

I just don’t know where to go from here, for me, my brother, and our sanities.