You're gonna achieve nothing and if there's the slightest chance of the site coming back, you'll ruin it.
Just wait. Option a is that the site comes back and option b is that they stole your money and you cant do anything about it anyway.
Best to keep calling the registrar and host etc. to try to find out who the people running coinmarkets were. Don't wait for them to come back. They won't come back of their own accord. They know we're all dying for updates and they post the minimal info on a website that's down -- They're clearly not acting in good faith.