If you would like to change your password, log into your account here and click on 'Change account details' and go to the section 'change password'. Fill in your current password first, followed by your new password. Do not forget to save your changes.
If you forgot your password, you'll need to click on 'lost password', enter your email address and hit 'request'. You will receive an email with a link in it (please note: this email may take some time to reach you and could appear in your spam/junk folder).
Click on the link in the email when you receive it, and you'll be prompted to enter a new password. You can then use the new password to login to your ZENGGI account.