some one changing my account email

Send in a new support ticket here:
http://support.z8games.com/webform_new.aspx

List it under Account >> Account Administration
Please fill in the details. Request a change of Password, Security Question & Answer, and Registration Email address in the Additional Information box.

Include as many things to prove ownership, including but not limited to: ZP Transaction IDs, Security Question & Answer, Registration email... etc.

There is no guarantee you will get your account back.