Have a support ticket open on bitblender and even though its only been a few hours, can anyone really say if they really reply support tickets?
I know the use @blender use to be active here and is affiliated with the site, however, I can't tell if he is still active.
As far as i know they are running a signature campaign which has been going for ages, and nobody has got any complaints about them. This means that there have probably been no big complaints against them.
Be patient - as long as you are on the right site(and not a phishing one), you should be able to get a response soon.
If not, then write on this thread:
https://bitcointalk.org/index.php?topic=436467.msg23266826#msg23266826 or PM
this guy.