I agree with DesirousOfChange. DA is doing it their way, playing by their rules. Do your thing YOUR way.
Myself, I ended up writing a DA letter months after I left but that was to stop them.from contacting me. The elders kept coming by unannounced. I would answer the door in my underwear and act like I was sleeping or just getting into the shower or go out, or else if I was working outside doing yardwork or washing my car they'd stand there and run their mouths. I'm in Florida. One summer day I was outside with no shirt on, washing my car and they started counseling me on modesty and that I should dress.like a minister. One elder said, "You look like you're all ready for a day at the beach," to which I replied, "Perhaps I am." Another thing that was happening was, some of the people were leaving me voice messages saying they missed me at the meetings. I would frequently find tracts and notes left in my front door when i'd get home from work.
So the letter I wrote was primarily to tell them to stay off my property and to stop contacting me. In the letter I also mentioned something about "since I already left the organization several months ago..." I did not give any reasons. I just said I was notifying them "in writing" not to have any further contact with me.