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.
The funds sent to a bitcoin wallet from a litecoin wallet in this case if the bitvest have the private key of the bitcoin wallet how bitvest will get the access of the litecoin? As bitcoin if anyone can log into bitcoin via private key then from the wallet it is accessible only bitcoin, not litecoin.
There are various situations like this.