unqualified personel

I cancelled my accounts the first one in 2018 and the last one in Feb 2020, I phoned the accounts dep and cancelled it personally the guy on the phone confirmed that it has been stopped and that there will not be any further debit orders going of since then no payments went off today 18/09/2020 i found out that my account was in arrears with R478.87 nobody phoned or emailed or let us know there was another payment now we got a bad name for something that was not even suppose to be there when i phoned today to ask why they told us it was insufficient funds for that month now i can give statements that the amount always go of on the first of every month and my salary gets paid in every 25th of the month how the hell is there no funds available for 7 month this was there after the last time I phoned them why didnt they take the payment this is the last time ill use vodacom they ***** our money thats all there was not one day that we did not have trouble with them