mmm I would say OP that sounds like a silly excuse... because these funds have been sent to a key that is in THEIR ownership not in the ownership of another entity! Yes this jey "belong to another account" but the coins area still on a wallet/key that they own the key.
I don't know your status in your country with gambling/crypto, but with any "consumer association" "gambling group" or even a "smart lawyer" you can definitely receive back these funds (and this is an amount that in western countries cover around 2-3 months of medium salary...)