They totally ignore the email send to them or set it as a spam message but i believe their Facebook, instagram, twitter and LinkedIn account is still active, it just that they dont usually update it.
I will advise people to report them to the company (Beosin) that audited their smart contract.
What will happen if we report the company? I don't think these companies even take bounty hunters seriously as many companies haven't paid their participants and still functioning well and I guess in this case investors did get their tokens.