deactivate the caller tune on Vodaphone india

i really hate to have a caller tune, but accidentally i pressed the * at the end of the call and my friends caller tune was copied and now it was mine :( , i just hate that .....

and song was :) -

Tera mujhse hai pahle ka nata koi , yun hi nahi dil lubhata koi , jane tu ya jane na ,,,,,,,,,

to deactivate - send CAN CT to 144 ( toll free ) ..