im just thinking here that maybe its time to get your own back?
as you hvae never written a letter saying you hhave let the plot go and that he now owns it, its yours still and the council cant really argue with that nor can he.
therefore, maybe find a way to really p*ss him off. Move things around a bit to where YOU prefer, its YoUR plot, you own whatever is on it??
sounds a bit childish but....