Understood.. but what happens when you uphold your end of the bargain after adulthood doesn't change the fact that you entered the bargain at an age not considered legal.
Bargain, contract, pact, deal, compact, etc. don't apply to an at-will relationship. Those are all terms of legal obligation and there simply isn't any legal obligation here. --Only your voluntary affiliation and the social fallout of leaving.
I understand the frustration and I can't tell you how much it pisses me off personally. (My wife is a JW who would have left by now except for family...)
Your affiliation is however only with your local congregation and not with the JW parent organization(s) I know it happens, but elders from a congregation you've never attended really have no business pestering you.