Gambling transactions only apply if coded as gambling, in most cases these tranactions are miscoded on purpose, also people are falsely told that these casinos are legal to operate in there country when they are not, this is misrepresentation, both of these are grounds for chargeback under master card ruled
Not even £1 refunded. Nothing else can be done. Chargeback is so not worth it. Used to do loads but too risky and not worth a flag, cifas or fraud team on your back.