Contract cancellation

Since November I have tried to close my Vodacom account - It has not been in use for about two years if not more. All I ask is that it be cancelled and still every month for the past 8 months. I feel that i should be reimbursed all that money. every time I communicate I seem to deal with a different person and so the whole saga is started fro the beginning I was eventually been given a reference number on 31 July 2020 - ***.