I personally sent a few emails to ask them to remove us, but we still receive this unwanted emails. A research brought following result:
www.dragonhispeed.com and it is existing, but the there used contact email address, email@example.com, is not working. A WHOIS search resulted in an other Contact email, firstname.lastname@example.org, but this is also not working.
(There is no spelling mistake in the above email addresses, there are written this way, but both are bouncing back.)
A whois.net search showed details Administrative, Technical and Billing Contact, which is Mr. Jerat Wattanakool, email@example.com. This email address was also contacted by me requesting a remove of my Domain from there email lists. The email did not bounce back, but there was no answer.