Contract Term Ended - but decuctions still going off

Data sim contract ended July 2017, contract cancellation submitted 31 August 2017, to date Telkom is not competent enough to cancel this contract, but yet very efficient when the monthly deductions go off. At Telkom centres, no cancellation can be done in store, no call centre can activate cancellation, and email must be sent to the cancellation department, this was done 4TIMES already and to individual team members as well! ITS JANUARY 2018, and still not cancellation. The data is not being used as we have fiber. Can Telkom actually be competent enough to cancel the contract. “Seriously”