do you consider betting on tir1 event, on the top 20 teams of the world cheating?
It doesn't matter what events you were betting on. Your account wasn't banned because you gambled on the "wrong" events. You are accused of multi-accounting for the purpose of cheating betting limits. For example, let's say your account's betting limit is $1000 max. That's all you can bet. They have found that you have created multiple accounts to bet more and wager $2,000, $5,000, $10,000, etc.
If you still feel that's not true, present your case to a mediator. They will take a look at all the evidence and make a decision. However, don't expect them to show you the information and ways in which 500 Casino got them. That's like asking,
show me how you found out I was cheating so I can improve in the future and avoid getting caught. Casinos aren't going to do that.