it is easy to recover and I believed those who saying that are such a scam shit site.
https://dev.to/thiagofm/how-to-recover-ltc-sent-by-mistake-to-a-btc-wallet-5h52#:~:text=The%20fact%20is%3A%20that%20sending,only%20in%20the%20LTC%20network.
and my point that for 4 years they haven't even reply or solved the ticket? like they didnt even care