Worst call centre agents and managers ever

So in Oct 2019 I was at fault for not making payment to my account I was in the wrong. So paid the interest and outstanding amount due to me not changing my account details on time. I then told the consultant that day in October ok then change my account details to the correct one and gave to her she told Mr Abrahams account details have been changed and will go off in November from the new account details, I then said thank you and hung up. November came the same thing happened called again and the same was done. December, January, February came and all the same thing happened and I called in all those months as well. A manager got involved on email Patricia Kommonda ahe rep**** one and when I ask what was happening she does not reply to email. My question to Management and the CEO of this major company allow 4 *********** consultants and 1 manager to work there and inconvenience a customer. Then the consultant Patricia that has the nerve to I'm am the irresponsible customer for not paying my account and that I must just even though i see the account didn't go off. After I have taken the necessary steps to ensure the account is paid. Not once but four times debit the incorrect account and then now she's says there is no history of me calling in and changing my bank accounts details and it's been removed because my bank account details does not work so I'm a cash paying customer but when I called in January they said my New account details are loaded but yet they debited my old account details and I no notes was made on the account. Vodacom is a pathetic and *********** company that can not employee proper people to do there jobs properly. I want the interest removed from those and plus a unpaid debit again to refunded. Pathetic company