Bad customer service

I received call from FNB today, unfortunately they did not get hold of me because I dont answer calls at work. They left a voice message for me to call them back. I call them back and get a rude consultant called Nonkululeko Mpanza, I explained to her that I received a voice message from FNB saying I must call them back regarding my Cheque account and i told her the department that i was told to call so that she can transfer me. What Nonkululeko did she said she dont know the department and it was a surprice because she is working for FNB. Then I ask her to transfer me to customer Service may be I will get consuktant who knows FNB departments. She ask me that do you want me to transfer you or you want their number. And I said to her mam I sad please transfer me, from there Nonkululeko droped the call without assisting me. Then i call back again and I get the other consultant who didnt mention her name i explain again, what she did she just transfered me to sales department without getting to know how to assist me in details and again line cut off because sales department that she transfered me to it was closed. I dont know if is how FNB treat customers if they call them. I now dont know what to do because their consultants are not willing to assist they are just dropping calls.