How did you contact them?
I submitted their web form and received the following email:
"Delivery has failed to these recipients or distribution lists:
[email protected]
The recipient's e-mail address was not found in the recipient's e-mail system. Microsoft Exchange will not try to redeliver this message for you. Please check the e-mail address and try resending this message, or provide the following diagnostic text to your system administrator."
By email.
Use the contact form, change the reason for contact. It changes the mailbox they have.
Their IT really is as crap as it gets.