I remember the incident. You were spamming comment on a guys game page because you wanted mobile controls, and he didn't want to add any. You also tried reporting the guy for bullying, which to be fair, I kinda get. I did see the original thread myself and the guy was definitely ragebaiting you. That being said you did still spam comments asking for mobile controls for his game, even though doesn't have to.
I think it would be possible for this ban from gdev game jams to be overturned if you make it clear that you won't do something like what you did last jam again.
Hope this helps.