Dissapointed VODACOM Client

I have been trying to cancel a contract for the past 3months now. I have been advised that the contract would expire in June 2020 and that I should call in then to cancel. I called in June to cancel the contract and recieved confirmation that same would be cancelled. On the 20 July 2020 the debit order for that contract was processed and collected from my account. I called in on the 22 July 2020 to query and was advised that the contract was never cancelled. I was however assured that the contract will be cancelled and the debit will be refunded within 48hours. I followed up on the 28 July 2020 and was again advised that there is no record of a cancellation or the debit refund. This time the consultant assured me that they would cancel and refund the monies owing. I will be cancelling all my services with Vodacom although I'm not sure if they will even carry out this instruction. I would like to receive a call from senior management and to have this matter resolved.