If you have a WHM reseller account, you can suspend a cPanel user from your account.
Log into your WHM account.
Go to
Account Functions
»Manage Account Suspension
or type “Manage Account” in the search box and then the option will appear.Under Select by Domain, choose the user you wish to suspend or, should you know only the username, select the user under Select by User from the
drop-down list
.If you want to add a suspension reason, type the reason in the text field or leave it as it is and then click the
Suspend
button.
The account will be suspended and it will display the suspension message. You can read it to verify if the account is suspended or not.