anybody from datashack.net ?

Is there anybody from datashack.net here?

I'm having a lot of problems with them and they are not responding my emails.

Thanks

I have sent out about a half dozen of e-mails to them
within the last few weeks as I have seen a huge amount of
attacker traffic targeting my VoIP infrastructures (managed)
and have yet to see my response. I just dropped their entire
blocks and blacklisted them period.