Contract cansellation

I'm struggling now for 3 weeks to cancel my one contract. There is no way to do it online via the Telkom app or portal, it didn't allow you. When you phone 081180 it refers you back to the Telkom online portal. If you request a callback, they never phoned back (except when you try to upgrade -then they phone immediately) Telkom is just useless and *********** I want to CANCEL TODAY !!!!!!