Quadrant Resource crowdsupport email unreachable: recipient not found

Wanted to get an ETA on the payment, but mailer daemon tells me:
-- Diagnostic-Code: smtp; 550 5.1.1 <crowdsupport@quadrantresource.com> Recipient
not found. <http://x.co/irbounce>

I did contact them before through this email, got a 1 sentence reply. Now the support email is broke altogether.

Started working on April 18, never been paid.

Make of this what you will

submitted by /u/rusple
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source https://www.reddit.com/r/beermoney/comments/nki902/quadrant_resource_crowdsupport_email_unreachable/