You got your password stolen how can you get it back

I got my password stolen on stardoll and i don't know how to get it back!
It was:
rihanna188
and some one stole it from me!
It was everything i had always wanted to have on stardoll!
I made a new account and I wrote to the Stardoll Staff , but no one has answered to my messege!
It was send about 4 days ago!!!!
Stardoll was everything for me!!!!
Please help me!!!