Breacih of Contract

My contract is expired and at the end of Jan I went to east gate store to give notice for cancellation. after spending an hour in the store I was advised to also send the docs to your cancellations dept which I did. I assumed that everything was sorted however Telkom still billed me and tried to debit my acc. Last month I again went to your store and waited another hour before being assisted. the manager informed me that my contract was still not cancelled but he logged it now. still nothing and my bank acc is being debited. I called your call centre and asked for a manager but was transferred to a team leader Sifiso. He promised to sort it out and call me back. I am still waiting. I am still receiving bills and my bank acc is in a mess due t you trying to *******ly debit it. I want a refund of all the return charges I had to pay on my bank acc and a letter advising that you are the cause for the returns on my bank acc. You are in breach of contract and I will take this matter further to your CEO and my legal representative. I want this sorted out immediately or I will take legal action against Telkom for tarnishing my credit record. Your staff just don't seem to care.