It's seems quite a bad experiences though, all my years gambling, this is the first time I'm coming across such experience coming from a gambler who has previously played the game. Well if I'm in your shoes I'll try creating a new account and if thesame restrictions occurs it shows that it's not a bug but an intentional decision from the game provider. However maybe you should try out other interesting casino games, there are several gaming options to pick from including their originals.
No, creating a new account will not be a good solution especially if casino have a rule to prohibit multi account. You can ask to their support system or refresh your modem so you will get another IP. But I think that is just an error that sometime happen while you gamble.
So there is nothing to worry if you can open the other slots games or other gambling games. Casino have so many gambling games we can play so that should not be a serious problem for us.