STEP::1 Go to Services and click on My Services tab.
STEP::2 After that, click on Active button.
STEP::3 Then, click on Management Actions and click on Request Cancellation.
STEP::4 You can specify the reason for the service cancellation and select the cancellation type, then click on Request Cancellation button.
That's It !
Go through the video tutorial to know the procedure in detail. You may check out the blog as well.