http://dbnation.net/forums/topic/sign-up-for-proving-grounds-6-here/
Already pm’d @RazielWarmonic on discord about a month ago and got completely ignored, dbn also didn’t seem to really give a fuck, kinda done with all this bs, it shouldn’t be to hard to give all 5 members of a team their prizes. It’s been quite some months since we won this…
I would PM Raziel here if you want to directly message her. Or if that is not an option for some odd reason PM one of the mods. I don’t think Raziel gets a chance to check everything considering how many forms of social media and other programs she has to check on a daily basis.
Plus she may have got distracted by another project given to her. I doubt she just completely ignored you though. 
I doubt DBN is ignoring you as well.
Lack of response does not really mean they are ignoring you. There can be tons of things going on in each of their lives that could be having an effect on this prize being given out.
I am sure you will get your prize once everyone gets on the same page.
Communicate with Raziel here as well as the DBN members when you get a chance to find out what is going on.