Very dissapointed with FNB CRS department and their senior manager

I just had a call from the head of CRS for FNB and frankly I cannot talk to this lady as the can't answer my question and she does not listen to reason. She has had 2 days to do her research on the said data and disappointingly failed dismally. As head of CRS 'n confused how someone in her position can't get all the info or have her facts straight as to the documents or profiles of customers. She than slammed the phone in my ear when I exclaimed to her I want someone that is more competent in the position and can actually have a argument with knowing her facts. This kind of behavior is totally unacceptable from a customer point of view. I do not want to deal with her and I want someone on 'n senior level dealing with this urgently!