You can delete Hosting accounts from your Control Panel. 

Please Note :
You can delete hosting accounts which are part of your Reseller Packages. For Hosting Accounts purchased separately, you will need to send request to Support.

  To Delete your Hosting Account

1. Log in to ControlDesk with your username & password.

2. In Products section, Select Delete Accounts.

3. You can search your account based on domain name, package,  customers/resellers or Server IP Address. 
Enter the search criteria and click Search Hosting Account.

4. Your hosting account should be now listed. Select the Checkbox next to the domain name to select accounts which you wish to delete and click Delete Selected Accounts.

Your Hosting Accounts will be queued for auto deletion.

  Learn more about Managing your Hosting Accounts.