**** guessing game it took my 1300 SG and now im down to 0
Of course. Those games are a gamble. Sure you can win but if you bet insane amounts don't expect to win. Not that many people play that game because you need to be a certain level first. What you did wrong probably it you bet way too much and you didn't test it with only a few soul gems. Then you thought all in was a good idea and you got a nasty surprise in the end when you lost everything.
I would be glad that it's not real money. Next time be careful and don't go near casinos in the future. Just a tip.