Billing me after I cancelled contract

On the 22/06/2014 i contacted Vodacom to cancel my contract account number QC293028-2. I received a premature cancelation from Vodacom for the amount of R236.25. I PAID THIS AMOUNT. I then e-mailed your cancellation department. The number was ported to Cell C. I no longer used Vodacom services. I then realised the contract was not cancelled 3 months later. I made a number of calls to your cancellation department and also visited Vodacom World 3 times. I spoke to a Robin Baartmen. I e-mailed him the cancellation documents also. I have begged Vodacom to please cancel this contract as I no longer avail of your services. I then received an e-mail date 05/01/2015 stating I owe Vodacom R2015 and that I am in breach of contract. I WANT THIS CONTRACT CANCELLED AND FULL REFUND OF MONIES PAID BY ME TO VODACOM FROM DATE OF CANCELLATION AS IT IS YOUR STAFFS INCOMPETENCE IN CANCELLAING A SIMPLE CONTRACT. YOU HAVE DAMAGED MY CREDIT RECORD AND HAVE CAUSED ME ENORMOUS STRESS AND COST OF CALLS AND FEUL TO VISIT VODAWORLD IN MIDRAND. CANT YOU'LL DO A SIMPLE THING LIKE CANCEL A CONTRACT. YOUR SERVICE IS APPALLING. NO ONE HAS CONTACTED ME PERSONALLY, NO ONE IS INTERESTED IN HELP.