How do I prove I don't have multi? I did KYC and 5-6 levels of that, where they even asked me to do face verification. What else can I really do?

Secondly, I am asking them to show me one bet that looks shady or where I took advantage of them. I have made bets on top tier games like MLB, LoL MSI that's the biggest tournament in League, highest tier of dota2 games.

They are making a baseless story about KYC because by their own standards it's marked as "completed" and I did everything they asked for. What's the point of KYC if they are not going to honor it?