I don't think it bears any legal weight though. From the first sentence where you disassociated yourself, their internal rules no longer apply to you and you no longer have any say in their internal rules. The stuff about the rules of engagement are thus moot.
Do note that in most English Common Law countries, you can sue an organization for breaking its own rules in a court of law as long as you are a member of that organization. Typically these are financial and leadership disputes among their boards and the members, but it is possible to bring any type of suit. The problem is its cost and it is thus easier to just start your own organization.
You can sue for slander, hence why they no longer announce WHY you were disfellowshipped from the platform.