Done and dealt with. Thank you all who helped
"The price of freedom is eternal vigilance"
Go look at this users gallery and check to see if your work is stolen and file a DMCA takedown notice here - help.deviantart.com/dmca/
Dont waste your time commenting on thier submisisons or main page as they are just a troll and you wont get anywhere with it. Just check for your work and report it to DA so they can see the person is violating more then one user.
Thank you to the user who notified me about this.
Thank you very much