Breach of contract and unauthorized billing

Hi I've cancelled my contract with Telkom mobile (8ta) back in September 2014. I followed the required cancellation process by submitting a fully completed and signed request of cancellation form of which i obtained from a Telkom mobile branch along with a written notice of my cancellation. A few months ago, I received a text (to my new number that I provided them with on the cancellation request) as I don't use the number I cancelled. To say I am in arrears and missed payment. This is when I realised they have been debiting me ever since and they've never actually cancelled my contract. Every month they continue to take money out of my bank account without my permission! I have spoken to the 8ta customer services dep and I keep being told it will get escalated and I never hear anything back. I've emailed a so called manager who hasn't bothered to respond to me. I am at my wits end with this, I want ALL my money back including bank fees for reversals and compensation for all the trouble I have been through with Telkom. What they are doing is ******* and if it doesn't get sorted I will take legal action. I still have the proof of my request to cancel on email. This is unacceptable