Fnb rude customer care agent

I contacted FNB cash investment to query as to why my interest for the month of April was not paid out and reflecting in my bank account...The lady i spoke to said she was going to send a confirmation to my app for me to approve...When i checked my app there was nothing there...She then said it did not go through and she would send it again...She then said that the system would not allow her to send it again and she would call me back...When i asked her what time she would call so i could wait for her call she rudley said that she will call when the system allows her to call me...I asked her again if she could please give me a time because i am at work and cannot sit next to my phone all day...she rudley responded again that she will call me when the system allows...This lady was very rude and impatient and it was like she was rushing to get me off the call...I have been banking with FNB for the past 40 years and even paid off my home loan with them...To get treated like this is disapointing and i am considering moving my investment over to a more professional bank... I still do not know what is hapopening with the payout...