Hi, I know what are you talking about, I think there is some low that don't allow casinos to accept New Zealand players. But I found this one
https://onlineroulettewheel.co.nz/, I personally prefer to play roulette, but they have all types of games + they provide you with great bonuses, like tripling or doubling your first deposit, up to 2000 bucks, I couldn't believe it at first. But they are also a fair company, so you should try to play there