I don't think Argocasino have their own thread in this forum which is why I don't think a scam accusation thread against them would work.
Argocasino has never made a thread on here, so I agree that a scam accusation on here won't be possible. It looks to me that perhaps a way to get in touch with them is through the people that work there like CEO or whatever.
My worry is that because they owe you money they're unlikely to be responsive but if you are willing to go far for this you could pay journalists to cover this, as I'm sure that will get their attention. This however depends on you,
and how much you want to pursue this and if you have the capacity.
Otherwise, as sad as it makes me to say this, you just got yourself a lesson learnt!