but I don't think the casino will refuse to recover your funds if you request it in the correct way, although it could take a while to do so, so you would have to be very patient.
Don't expect most crypto-casinos will allow the recovery request regardless of the amount.
I'm pretty sure 90% of crypto-gambling sites will refuse that request, especially if that was part of the site's terms and conditions.
No harm in requesting, but don't expect it will be granted.