I'd wait to do that.
I think a week is fine, you should always remember that a flag is final.
They online and make some update on the twitter about CSGO at 15 Jully 2020.
I think the victim already can put them flag since there is no reponds at all from them but they can make some update for their social media on twitter. Creating a flag and inform them on twitter will make them online maybe XD.
They have time to update something on social media but they do not have few minutes to online in this forum then reply something here in this thread, it is not good at all.
I'm sure they are aware about the issue but they do not want to answer/confirm or fix it.
If it is true, flag wont make them come back here in this forum. If they are legit casinos, they should have at least gave an answer here.
But flag or red trust will obviously help other members of this forum to stay away from cyber.bet