It is now 100% sure, 1xbit is owned by 1xbet (even though they say they aren't) look, I created an account using Korean VPN:

year ago you have a claim of 169 dollars from this site but of course you are blocked
https://bitcointalk.org/index.php?topic=5445339.msg61938242#msg61938242 after that request meaning you experienced what all of the victims claiming here.
and now its getting clearer that 1xbit is another part of biggest scam gambling company in online in which 1xbet that gad been accused a mother of all scam gambling site.