As much as I dislike japan, they simply were right in this case.
You could have asked in the thread that JALPak linked already, and you would have gotten the right answer (as many did before).
(I actually expected this thread to be about JAL _not_ correctly knowing the 72 hours TWOV rule before clicking on it

)
So - you've my sympathy, but nope, JAL did nothing wrong here. Sure, they could have been more supportive, but then I wouldn't have expected anything else from them.