And now they are keep doing maintenance on their website. Honestly i don't know if the maintenance is real or not and we can't do much.
If many cryptocurrency exchanges like that, i think we should do something as a community to pursue the scam exchange.
I have an advice for you: if a cryptocurrency project is created and developed by the Vietnamese (BCNEX is an example), it will turn to a scam because the Vietnamese government does not recognize cryptocurrencies. so the scammer will not be overpowered by local law.