Shocking Attitude

I just received a call from Nedbank credit card division from Craig Mutiri regarding the credit card account and he was extremely rude and demanding. My perception of Nedbank has completely changed. I have just recently joined Nedbank and I am starting to regret it. I am even considering of moving to another bank. When i told him he is being rude he told me thats how he talks an raised his voice at me. Hi customer service failed to meet my expectations. The usual service I receive from Nedbank is exceptional,I dont know where they got him. He even refused for me to speak to his manager.