Cancellation not completed

A whole new level of customer service! I called on the 27th Dec to cancel my contract with Cell C and a lady called Natalie asked me if I would want to opt for a R99 bundle which I said no and asked about a deal that had minutes she gave me a price and I said I would think about it before making a decision. Natalie advised I would need to contact the service centre if I wanted to upgrade and it would need to be done before the contract goes over to prepaid. I said that I would call back should I wish to upgrade but to proceed with the cancellation. I called this morning and spoke to an extremley rude agent who advised me that when Natalie asked to keep things as is I said "YES" ofcourse I said YES i was calling to cancel not to keep the contract!!! that why I said I would make contact if I wanted to upgrade. She did not ask if i wanted to keep the contract active in no way did she use those words because I would have corrected her if she did. she made her own perceptions of what was said and now I have to pay for another month! Can a retentions manager please give me a call.