i understand better now. It’s clearly a more complex issue than it appears- by that I mean it was not a straightforward scenario from the long list of multiple scenarios many of us experienced. Yours involves a few added complexities that contributed to this denied boarding clearly.. also I can’t help but notice it is AF and not KLM again… I do find some patterns in those who got an ‘easy’ ride and those encountering issues!

overall, it’s hard to give a quick solution in this specific case but if you did have a valid e ticket and if you were able to manage booking for such a long time up to departure, it does sound like denied boarding- but again your story is quite specific! If Af is refusing to move, then one solution is to buy your own ticket now and then claim back based on the evidence you have and gathered. But again it’s not the best or easiest given circumstances.

others with better knowledge of denied boarding rules might be able to help. And sorry again for you ! Must be very frustrating