2) The letter you received from the devs stated that there were several occurrences of save file editing, which could be due to many edits on this legacy making it impossible to actually attain naturally. If this one is hexed, then the other legacy may be hexed.
If so, they may have seen your posting of your orange legacy as you flaunting it right in front of them, even though you were not aware of its actual origination.

Idk how you attained them, but contact the supplier and ask them to verify with these devs that it is legitimate. Perhaps that may solve the ban problem.

It sucks you were banned. Hope this helps fix your situation.

1) Hey... I've been looking at your reports of an improper ban for years. I'm new to actually playing the game, but I see one thing out of place. This orange legacy which you bought from a friend on the cheap cause he won it from a raffle. I propose to you that this item may be the cause of your problems.

You point out here that the color orange may seem strange. Perhaps the raffler [or the person they got this item from] edited the item, then moved it to another account, continuously, until the end use with the item implemented it onto their account. IF the color orange is not even a legal color for this item that could be the dev's first clue that its hacked.