*********** call centre agent

I opened and FNB account and was offered a sim card which I was told I could port my number to. I tried several times on my own and eventually called the call centre for help. BAD IDEA!!! The consultant asked me to change my sim back to the old one and told me he would call me within 2minutes. After 30mins of waiting, I decided to call back. He told me how he's been busy and how he intended to call me when he could. I tried to explain to him how you cannot promise a client something and then do something else. He went on and on lecturing me about why I cannot call him stupid and how offended he was and then hung up on me. He also gave me the impression that FNB has appointed only him to assist with porting SIMs. I want the service but I'd hate to believe that all FNB clients are at his mercy. He is rude and has no desire to assist. Please help.