Why that doesn't matter? If my bets record is deleted how I can prove it? Duckdice.io deleted my account when I raise voice against them in public. They deleted the data and kept some data that is not showing any details- You cant find if a bet is win or lose but you saying that doesn't matter, and the result is fair?
Didn't you request them to delete your account? If not, then you can proceed with your legal action against them. But you have to think about what you are going to achieve by filing the case against a casino where you played over a year ago. The casino is fair and you can check your bets any time. Why didn't you check your bets when the incident occurred?
It is obvious that you are trying to milk the casino now with the hope to get something. That is not how casinos spend their money. You had to open your case when it happened. Since you do not have any proof, no scam happened. Case closed.