Incorrect billing

<p>I had a Telkom mobile account for over 2 years. In March I cancelled the contract by walking into one of their stores and cancelling it. I am a still bbeing billed for the same contact. I have sent numerous emails attaching the cancellation letter at the request of customer service. After been billed a big amount, my new contract and cancelled line which was converted to prepaid have been suspended and I can no longer reach customer service. Thanks telkom....great service</p>