If its just to prove a point then here is what i would do.
Walk in to the hall 15/20 mins early, happy smiling, greeting your brothers and sister as you walk to find your seat, dead front and center.
If asked by an elder to meet them in the second school ( is that still a thing) kindly decline as your happy where you are. leave at the end, as normal happy and fufilled with spiritual nourishment.
Show them that thier authority dosent exist.That the disfellowshiping actually means fuck all.
That what I did!
Enjoy the moment.