Vodacom will not cancel contract

On 2017/12/02 my father cancelled his Vodacom contract after it's full 24 months has elapsed (Ref 1- ********** ********** ). Instead of cancelling, Vodacom decided to rather upgrade him. After numerous calls, he got a "Vodacom cancellation order" nr (1- ********** ********** ) on 2017/12/12. Despite this, Vodacom HAS NOT YET cancelled his contract, and now will not assist him via they're call centres, because he stopped they're monthly debit orders. They ***** his money every month and is ensuring he cannot cancel with them. *****ing from a pensioner this way is ******* and immoral.