When questioned regarding continued payments to the union i would look astonished and outraged." I never noticed, im gonna ring them immediately and put a flea in their ear". If questioned regarding the apparent lack of communication indicating a desire to remove myself from the union. I would firmly explain the phone call, email, letter of such and such date was sufficient and if they couldn't find it or didn't act on it, well, it sort of reinforces my reasons for leaving such a shambolic union. Of course if not questioned I would find it prudent to "discover my continued membership" and inform the union toot sweet .
....and that would probably work, for my household now has copies of recorded delivery letters requesting that the union confirm membership exit back in Feb and despite that and several phone calls the only communications recieved from the union is usually ballots..!
The membership administration is a total mess, it has to be.