Rude Agent from FNB

Called call centre regarding to debit order Agent name Gundi Gundi was extremely rude. Explain reason for my call before finishing my story Gundi ask amount for debit order he was agitated after telling him to shut listen my query he told me is going to terminate the call. He did I use my air time to call them you are on hold for more than 15 minutes agent decided to cut a call your gave him a right to cut the call if he cannot handle pressure why he didn't call his supervise???????????????????? FNB service is appalling. FNB need to deal with their agent. This is not first encounter rudeness from FNB.