So I think you should try to act as if you already know what the "big misunderstanding" is about when proceeding to submit a ticket.
(That's SORT of worked for me in the past, when my illegit main was frozen for doing something I'd never done. Although I was telling the truth anyway, I feel like they quickly returned my account because I stepped forward quickly, ready to explain myself in regards to the reason I was frozen. But if they'd actually paused to investigate my account further, I'm sure they would have noticed I WAS in fact cheating
and then would not have unfrozen me.)