Just tell them to accept your letter at face value and you have nothing more to say.
You've already followed their rules further than they deserve: somebody somewhere has waited 30+ years to see if I would send one
by you talking with them, it shows them you are still bowing to there authority!
Don't give them the satisfaction: if anything, send it again, Return Receipt Requested. Join the No More Interrogations Club.
They are required to contact you to confirm the letter, as they form a DA committee to confirm the DA evidence.
Leave them, in the dark: loose ends dangling. It's their problem not yours.
Here is my DA letter with all kinds of facts proving God never chose the WT world for anything.
The problem is the JC's are basically instructed to "NOT GIVE YOU A FORUM"; all they do is hear enough to decide on "kicking you out".
You don't owe them squat...as if they're some authority that you have to answer to...
Bingo: no gun, no badge, no warrant
If your not worried about being disfellowshipped tell them to F#@$ Off !
If they call again, file a harrassment complaint with the authorities.
I doubt they would get nasty enough, but there are also Restraining Orders
Mustang