Sportbet.one has a support chat on the site and you can always give your feedback there, they are really responsive and will forward it to the devs. That Said, I've been using sportbet.one for quite some time now and never had problems with them. For as far as crypto sports betting goes, it's one of the site that I have used the most since what they offer generally is better than others like betfury who just use software and odds everyone else is using. Sportbet seems to have their own odds and their prices adjust based on money that come. Also they allow you to bet directly from your own wallet reducing the risk and making it more decentralized. That said, it's by no means perfect and other platforms do a better job in luring in the real 'gamblers' with better loyalty programs and bonuses. For any Crypto Sports bettor, I would say Sportbet is a great way to diversify and be able to shop for the best odds.

Good Luck!