Time has passes and I see the exchange didn't say anything anymore.

Meanwhile, Coolcryptovator flagged the exchange: https://bitcointalk.org/index.php?action=trust;flag=1009. Feel free to support it. I also mentioned the flag in the Request Support (or Opposition) for Flags here! topic.

Maybe DT members will also give them negative feedback.

This is all this forum can do... From now on the scammed members should file a Police report.