CANCELLING MTN CONTRACT

Why is it so difficult to cancel MTN contract. I have been trying to call them since 9am its now 11:30am and I am still listening to the **** music with no help. I made so many calls with no help. :( I have been calling 135 and have been put through to so many different consultants and they all say "please hold while I put you through to the cancellation department" the next thing I am still listening to the music... :(