Never heard of this site before to be honest. Weird thing is that the gambling sites whose names start with lucky usually end up as scams and Luckyfish seems to be a scammy site too based on what some posters above posted.
Coming to the issue itself, chat bans happen for a plethora of reasons(fair and unfair) in all kinds of sites which is why the issue you brought up is pretty common and trivial and easy to resolve op.
This site is 100% scam. they operate with no license and accept minors.They were operating in the Uk and they got caught now their IP is banned!Its all over the internet that is 100% scam , people should check reviews before throwing their money to scammers.