Dont know real reason of this bans. I am doing the same I've been doing since, BFG free boxes appeared (claiming, spinning daily wheel and etc). My page just refreshes and I got that "The owner of this website (betfury.io) has banned you temporarily from accessing this website."
Some users got the same notifications when the Betfury site was not working correctly during the recent DDoS attack. So I assume you can't access the site because the Betfury team probably banned some ranges of IP addresses, not your account. By the way, if you use a VPN service to access the Betfury site, the problem could be because of this. In that case, you should try to change it to another one.