someone stole my name

[Spl@$h~]

Hello guys ,
Someone stole my pseudo with my clan tag what can i do to stop this ?
I'm =*S|w*=Nemesis+ and him =*s|w*=Nemesis+
( http://et.trackbase.net/index.php?mo...fo&idx=2327863 )

Sory for my english :s

Here are the other alias of the account :

		=*S|w*=$h@k3 .NY|NeTaN+ =*S|w*=Nemesis+
		maybe you know that guy and can contact him , Contact Paul for more infos or to get your name back.