TELKOM - Can't cancel contract!

I've been trying to cancel my contract with Telkom for a very long time. To cancel I have to go online but their system never work. I entered a request last week Wednesday and got a notification that they will give me a call within 48 hours. Until today I haven't heard anything from them. Called the customer service - had to wait over 20min and when someone finally answered they told me the same old story about cancelling it online. She interrupted me a few times, was rude and didn't even listen when I told her that I can't cancel online because their system shows an error message! Absolute POOR service and I am still struggling to cancel this contract!