Contact BOOKMAKER here https://bitcointalk.org/index.php?action=profile;u=174244 is what I would say if they are not responding to your emails.

I would say that do KYC and ask them if they are fine with giving the account and amount back if you do the KYC. It's not necessary that you are accurate with digital footprints as they say everytime as one's ISP can issue dynamic IP address and that can lead to a harsh penalty for someone innocent.