You can unsuspend cPanel accounts from WHM. Follow this tutorial to unsuspend your cPanel user.
Log into your WHM account.
Manage Account Suspensionor type “Manage Account” in the search box and then the option will appear.
Under “Select by Domain”, choose the user you wish to unsuspend or if you know only the username, select he user under “Select by User” from the
dropdown list. If the user is displayed in red color, it means they are suspended but if it is showing normally, then the user is already unsuspended and you do not need to unsuspend it.
Click on the