I no longer profess to be a member of this organization, I have nothing to do with it,
Well then Raven you have a choice of simply stating in a return letter or phone call that you made a personal choice to leave the organization and that you respect your responsibility as elders over the congregation.
Make it short and sweet, they do this for their own appealing stature and power so you don't have to bow to them and nurse this kind of social behavior.
I've always said if your going to leave the JWS and you have family and long time acquaintances, it makes sense to leave on quiet note, it makes them think and contemplate why and how come.