In order to cancel the service, first you need to login to the billing management client area using  the following URL:

1.  login to your client area at  https://secure.hostmight.com/clientarea.php to manage your new domain.
2. Once you logged in, click on Services -> My Services tab.
3. After that, click on View Details button against the service which you want to cancel. Refer the below screen capture:
4. Then after click on Management Actions -> Request Cancellation.
5. You can specify the reason for the service cancellation and select the cancellation type, then click on Request Cancellation button to proceed further.
   
   Once you send a cancellation request, you will receive a confirmation email at your billing email address.