1 month ago, I made a mistake, I sent $2418 USDT (TRX network) from my Binance account to a TRX address of Duelbits. At that time, I have both TRX and USDT in my Binance account, so I send mistakenly USDT-TRC20 instead of TRX because both of them are on the same TRX network.
I have gone through most of the posts of this thread and also read most of your replies and I must say that the amount is really of good value to many people. I don't know that $2418 means a lot for you but for someone like me that value is really a lot. I have had done a similar mistake when I transferred my funds to Roobet a few months ago and I selected the wrong network during transaction. I thought that my funds are gone because it was my own mistake that I selected the network which had lower fees as compared to the one that Roobet accepts.
I contacted their customer support team and told them about the issue. After a conversation of 10-30 minutes they just added the balance to my account and warned me that if in future anything like that happens then why won't be responsible for the losses. The amount that I deposited was very low in value as compared to yours and that's why I recommend you to continue your conversation with their customer support team and I'm quite sure that they may find a solution for you. Otherwise, it will be a lesson for you and all of us that during depositing selecting of wrong network can cause huge issues.
Can you provide screenshot of your conversation with the support to backup your story because issue like this typically won't solve quickly especially if they didsupport at all the blockchain network that you sent in just like the case of OP which he sent TRC20 tokens to an ERC20 dedicated wallet.
Solving a 10-30minutes for delicate issue like this is surely amazing if you can backup it up with proof. This will help OP to make his case better since other Casino can do this quickly while Duelbits can't.