Cancellation period

Called Telkom on the 12th to cancel my smart broadband the lady my billing cycle is on the 3rd and I can phone then as it will be an immediate cancellation. When I called today to cancel I am told that the cancellation takes a month and I will be billed in March. I need Telkom to retrieve and listen to the voice recording as I will not be paying for this as you advised that the cancellation for my service would be immediate else I would have done it on my first call instead of now. I have already moved on to another service provider and have paid for February and not using the service anymore.