d.tube-Account silenced

Hi, I'm new to social media. I would like to share my art on d.tube:
https://d.tube/#!/c/electronic-music-westhagen101

Unfortunately, the user teamhumble labels my work as 'spam' and down votes it, so that I'm pretty silenced.
I've read the white paper, but could not find anything in it, terms of use or community guidelines, which would explain his actions.

I don't know how to contact him.
Could someone give me a hint how to handle such a situation?

Thank you.