I will say this is actually a trap or a way to steal someone's money. also, an example of multiple id and country does not support. When people do register there is no problem but when try to withdraw there are several excuses come.

we have also guilty in this case because we don't care about the site terms and conditions. even don't read it for one time. And as I know a few months or a year ago Hitbtc asked for KYC to all users maybe. So you don't get the notice during log in?

It's not a little amount. So try to contact their support. Request them to solve the issue and if they ask for KYC do that if you don't think it's a problem for you.