Hi

I can't see their official twitter and also can't see some volumes of all tokens on exchange.

https://imgur.com/a/uewz0

Is etherdelta.com really gone?

Here are some relevant account, but I don't think these are official:
https://twitter.com/EtherDelta
https://twitter.com/EtherDEG

Etherdelta is good for now, where do you get your information, its good to do is make research before you post.

Take your own advice. EtherDelta isn't functional at all. The last transaction displayed on EtherDelta was 6 days ago!