Cell C being dishonest

If i could rate lower I would. I had 2 cell c contracts for my daughters. One went to America and one got a company phone. I paid both accounts for 6 months without them being used. I was told that I could only cancel the contracts on the 19th Aug as it can only be done one month prior to the end of the contract on the 20th Sep. I email the cancellation letter on the 19th of Aug as we would be on the road the 20th and 21st Aug as we were relocating to Cape Town. on the 4th Sep I realized I did not get any correspondence from Cell C and phoned them. They told me that they did not get any email. But they will cancel the 2 contracts. and that I will not pay any more money for the contracts that was unused for months. by the 12th I still did not get any conformation of the cancelation. once again I was told that I did not cancel the contract. They told me they will now cancel the contract but because I did not cancel in time I need to pay one more month. I told them that I WILL NOT pay one more month as I cancelled in time and that it is their staff that did not do their job. I was then told that I need to pay and if they can confirm I did not use the numbers for a couple of months, they will refund me the money. I told them I can not take that change I would cancel the debit order on my side. 2 Months later a debt collecting company phoned me to pay. I send them all the correspondence and after 2 months were told that Cell C cancelled the debt collection with them. About a month ago my husband told me that I was listed on my debt profile as a slow payer as I have not paid my cell c account. Then I started getting more calls from another debt collecting company. i once again send them all my proof of cancellation. This is rally unfair, I was a client with Cell for years and years and never paid one day late. Their staff is *********** and now my name is dragged through the mud. I want my name cleared. I have now spoken to a few people that Cell C did the same thing to. This is absolute bullying tactics and need to get my name cleared.