I was having a problem while deposit litecoins into the bitcoins wallet on their casino.
baodo159 is the worse gambler, I have ever seen who has sent litecoin to the bitcoin wallet and claiming that fund and blaming a site. You have not enough knowledge that you cant send litecoin to bitcoin wallet. If you send by mistake then that will be loss forever.
Such funds can be recovered. In this case, it must be done by the person who has access to the private keys of the wallet to which Litecoins were sent. In this case, it is clear that OP made a mistake, so I just advise him to be patient and wait for a response from Bitvest support. Now it is only up to them how this case will ends.