Useless Call centre agents and overall service

I cancelled my dstv subscription in November 2021.I was advised that the service would be terminated on the 25th December.I called numerous occasions to confirm subscription is cancelled and that my account will not be debited and the consultants confirmed that my account will not be debited.To my surprise my bank account was debited.I reversed the debit order and i was refunded.I am willing to pay that refund,however i am now receiving messages that the account is terminated and i owe R1078!I am owing this for what because these service were disconnected on the 25th December.Dstv make sure you never debit my account again,provide bank details and a reference to pay for the refund and stop sending me stupid messages.