^ See?
Look at Roobet, this is how casinos treat their customer when it comes to trouble, we know it is your mistake but a casino should help you when it comes to this trouble if they value their customers. I appreciate the kind of attitude of the casino that showed above about roobet and which is how we test duelbits team resolving their customer problem. Let us see how they will handle this matter and if they will help OP.
Casinos have policies too, and since they mentioned any wrong deposit will end as a permanent loss on the deposit page itself then duelbits can't be blamed for this.
About Roobet they took this and treated it in another way but can't expect the same even from them again because they made it clear in that chat itself. But OP you can only hope you may recover funds if Duelbits wants too but there is nothing beyond that.
If that's the case then it's an expensive lesson, never make deposits in a hurry, and make sure the destination address, network, and whatever as many times as you can until you are sure that there is no mistake.