Horrible service by fnb

Good day. I called fnb this morning and I spoke to Derin in regards to the funds that dissapeared from my account. While we speaking on and I was angry the agent raised his voice on me and spoke to me with disrespect and belittling me. I am not sure why would an fnb agent speak to me like this if was it because I am black or was it because of the account type I am using. I called again after being treated badly by deren and spoke to Neo and ask for the manager and neo agreed and then transfered me to a wrong department on purpose to get rid of me. I spoke to xoli from documents department where I transferer by neo to find its not the manager. I asked to be transferred back to enquiries department and spoke to Zinhle the only person who tried to relate and tried to assist. Fnb does not deserve clients. They treat clients with disrespect.