About WHM:
WHM stands for Web Host Manager. It is used by the server administrator or the resellers to manage their hosting accounts. It is the backend for all cPanel accounts. Now you can see How to suspend Reseller in WHM.
Steps for suspending Reseller in WHM
Step 1: Login into WHM
Step 2: Go to the Reseller option in WHM home page.
Step 3: Click the View Reseller Usage and Manage Account Status option.
Step 4: Search the required reseller account and click submit button.
Step 5: Click the suspend all reseller accounts
Step 6: You can wait until the process complete
Step 7: Then after, you need to unsuspend reseller account, follow the steps 1,2,3.4 and click unsuspend all reseller account option.