HANGING UP ON CUSTOMERS!silly security barriers

I have been receiving continuous offers from Vodacom regarding my upgrade options. i eventually call back today. Thokozile answers after I was cut off. the IVR already identified my number but I ask her if she has my details. she insists on knowing why i am calling as if there is a script that I must follow with her, I do tell her I am calling to upgrade. she asks me the usual including the number confirme by the IVR. then she goes on to say she will ask me questions unrelated to my vodacom acc.(Why) then she says i failed. she tries again an says I failed and she cant tell which ones I failed. she says a superviser will call me. very annoyed about this I ask to speak to the superviser on the call. she refuses. SHE Insists this is process, i ask how she can use a one size fits all approach at this point she is raising her voice and creates a barrier because of your processes which I find unsatisfactory. as she reaises her voice clearly agitated at repeating herself she hangs up! i havent defaulted on any payments and this is unacceptable service. Please cancel everything in my name. Niyadelela mos and your security questions should be relating to my details with