Another case where I wonder, how and why would anyone choose some random small site over some big established site with a much better reputation?!
Seems like they free rolled you but I mean, it could be worse right? You got your money back, that's the most important part. Real scam sites would just take everything and that's the end of it. Of course what they are doing (if you actually did nothing wrong) is more than scammy, but that's kinda common if you try your lust with unestablished brands. First you have to pray to win, then you have to pray to get paid. Quite sad!
Good thing is that you won and then saw what kind of people they are. If you lost and maybe deposited more and then win a bit just to get denied to withdraw it would be much worse.

Hope you will get the rest but if not, see it as a lesson to be more careful who just trust with your money with next time!