i didnt remember which mail i was use

Account info are not recoverable.
Send a support ticket : 
1. If you have access to game account -> account administration -> select change email
2. If you don't have access to game account -> account administration -> account recovery

https://support.z8games.com/us/index.php?/Knowledgebase/Article/View/181/33

If you are able to provide enough correct required info then support will ask for a new email.

There is no other way.