Poor service at Telkom

After trying several months, having numerous telephone conversations with call centers. Some of the calls over a hour. A finally got my service installed. I specifically ask the day i ordered the service if i can cancel it at any time which they agreed upon. Now that i want to do that, there are nobody that can assist me with that. Also telling me that i am on a 24 month contract. Which I never asked for, because i asked specifically at the beginning if i can cancel the service if i no longer need/want it. I am still waiting after a month for them to play the recorder version of the conversation the day a agreed to the service. Still nothing from Telkom, The same as in the beginning to get the service, the struggle continuous to get rid of the service. Pleas advise what to do to get proper service and feedback.