Send an SMS CT STOP to 20000 and you will receive a list of your subscribed content.
Alternatively, you could download the Caller Tunes app to manage all your content.
I CAN'T CANCEL MY CT
You can download Digi Caller Tune apps on your handphone and unsubscribe caller tunes for your number ya. :-) http://new.digi.com.my/apps/callertunes