There is no way to delete a character in Entropia Universe without deleting your account.
Account can be deleted, by contacting support on the official website.
If you really want to delete your account in order to create a new, you should go to the official website https://account.entropiauniverse.com/account/, enter your username and password, and then click the My Support Cases button.
In the menu on the left under Contact Support, select Submit a Suppot Case, and select the appropriate categories. Next in the form write in English, what do you want to delete your account, to create a new.