Telkom does not have a clue on how to give functional service

I am have been a client of Telkom for a couple of months now and I am already regretting my decision. The level of service and the rudeness of one of their consultants is appalling. Yesterday I called with the intention updating banking details from which they debit, needless to say, I was both shocked and angry after a call duration of 31 minutes of which most of was holding and awaiting to be assisted. I received no assistance and in fact received bad and ill mannered treatment from Thembisile Ndabane/Ndubane/ Ndamane. She first of all updated my details and asked me to hold while the system processed the update (this took an entire 10 minutes), then after advising that the details had been updated proceeded to tell me that Telkom cannot just update a client's banking details and order the next debit order from the new account. She claims that Telkom will continue debiting the account that I have already told them is closed due to ********** activity, and if it bounces, which it obviously will, then I will have to incur costs amounting to R 202.00 as a penalty for something I have told them well in advance to change and that there is nothing telkom can do alternatively, after querying the stupidity of Telkom's processes , the same consultant tells me that she should not have warned me she should have instead kept quiet and let me incur the charge after which I instructed her to speak to her manager to give me a better explanation because i could not believe that Telkom's consultants are permitted to speak to non understanding clients in such an uncivil manner. The same consultant makes me hold a further 10 minutes before advising me that her manager is not available to speak to me. She further advised that I would be contacted within 24 hours, and as I am writing this comment no one has even bothered to do so, I also asked for the recording of the phone call they claim is to protect the both the company and myself and she failed to do that as well. I personally would have never given Telkom the time of day if I knew that this is how they operate. you honestly cannot tell me that a company as big as Telkom by now cannot just debit my new account from this month. I demand a solution if I am really as they write, a dear and a valued customer because when I came up with one, their incapability!