Man, I am so sorry this is your situation. I won’t pretend to really know what advice to give you, other than you should contact adult protective services and see if they can do anything since you are a vulnerable person (aka disabled).
Again, I don’t know shit from fuck, but that’s where I would start. Idk if the cops would take the threat seriously or not, but you might be able to file a restraining order.
This year they came out in droves, to the point where their sound was ear-splitting and drowned out most of the cars on the major road I live on. The sound is one of the worst things I have ever heard (intense bug phobia)… so yeah, fuck everything about this.