Constancia Makhubela Hung Up the phone on me refusing to assist with my inquiring request

Hello Peter, I am Nkanyiso Nxumalo, young entrepreneur, self employed owning a fleet of cars financed by different banks, I have never been this disrespected and looked down at over the phone in my life. I app**** for expected payment dates to change with all banks financing me and trusting me it was not a hassle, doing this because my own clients pay a bit late and I want to avoid a bad credit history, done over the phone effortlessly. I contact Constancia Makhubela for the same request and fine i received a response which is fair, but she would not further listen to my inquiring on asking because I was declined changing my payment method and there a steps to follow, Nedbank decline after those steps, will there be reasoning given? and will it stick that regardless I also cannot change how I will make payment is there a door open to meet my request half way because I do not want my credit history to be in risk? She refuses to inquire which clearly she does not want to give me the time to process my request, worse she hangs up the phone with a sarcastic tone of "enjoy your day sir", what did i do to deserve this? clearly I am not taken seriously it is either her way or the high way, she won't care what happens to my credit portfolio. I even stepped out of a meeting respecting her to take her call but she wont give me the same treatment, and when I ask to please be emailed a number I can call on anyone in the organization who will listen to me and inquire for me she refuses, instead wants me to go look for a pen and paper to write it down, seriously? I am a CEO of my own company and I work hard to stay humble and go the extra mile with everything I have today, whether it is financed or bought cash, but she will not? Constacia hangs up the phone on me? really? I seriously disappointed.