Unreliable Service and Nonexistent Support – Requesting a Refund

I’m experiencing the same issue, the link to my order redirects to CSSI. Emails sent to *** result in the following error response:

Address not found Your message wasn’t delivered because the address couldn’t be found or is unable to receive mail. The response from the remote server: 550 5.1.1 sorry, no mailbox here by that name (chkuser)

The website has since been updated with the message: "I sincerely apologise for the recent disruption at ITWORKUP....."

This situation is unacceptable. At this point, I would rather cancel my order and request a full refund.