Parthetic Telkom service

I had a month to month data sim contract with Telkom the I went to their branch in Johannesburg city when the simcard was not working for months, I was told by the consultant that there is a problem with the chip and I need to replace the sim with about R150 fee I told him rather cancel the contract which he confirmed to be cancelled and will not debit again because they just debited. To my surprise they debited the following month, I went to Maponya Mall branch the lady said to me the consultant that cancelled the contract should have told me that they still gonna debit for the last time, I told her I don't understand because data has not been utilised and also the consultant's misinformation is not the customer's fault. I reversed the debit order then they skipped a month then R1000 was debited. So now I'm tired of reversing debit order would like Telkom to cancel it or else I'll be forced to close the account and open a new one. Debit description: TELKOMMOBI***.