Contracts ended but Telkom do not want to cancel it

I have a Data contract and a Mobile contract with Telkom. The data contract end date is 8/12/2017 and the Mobile is 15/12/2017. I emailed the cancellations department on 7/11/2017 with the cancellation forms in order for them to cancel/stop the data contract 8/12/2017 and the Mobile contract to cancel/stop 15/12/2017. No response received so I went to a Telkom Branch on 2/12/2017 and they said nothing has been actioned. I then called the call centre on 8/12/2017 and then spoke to ********** who said nothing has been stopped, I then emailed him the cancellation forms, but had no response. I then called again on 8/12/2017 and spoke to ********** who said that they have received my request and will look at it, so I then emailed the cancellation form to her on 2/1/2018. My data contract and mobile contract has still not been stopped. Before you select a Service provider please check Hello Peter as you don't want to hit a problem later when you contract comes to and end.