Hope you had the issue resolved like their team commented above. I have personally not been asked for KYC on sportsbet, but I have read on the forum that people had. Irrespective, never had an issue with the site even for withdrawals over 1 btc.
Next time, please post additional proof, so we know that you are serious and that ways you will get more help and support on the forum for your claim.
My problem was solved with their help and I am still active on their platform. I think this should be a misunderstanding of fraud. I hope that others will not encounter such problems and can successfully gamble, but I still hope that the gambling platform does not need KYC certification, because I think blockchain gambling should be anonymous.