Bad customer service

I have never seen someone who does not know customer service like Nadine Smith working at MTN Waterfront Bloemfontein. I went there to blacklist my phone she told me that she can't find the IME number. I went to Vodacom they told me that I must go back to MTN because I was using MTN sim card. I went back to MTN Nadine told me that there is nothing that she can do because she told me that she can't find the IME number. I asked a polite well mannered man Jean to assist me and he managed to get the IME number and blacklisted my phone. I told Nadine that Jean managed to find the ime number instead of apologising she was so mean telling me that that guy used a different number what suprises me is I gave them the same documents and they used the same system. We need to humble ourselves in life regardless of our colour we all make mistakes nobody is perfect therefore it is very important to admit when you are wrong. She wasted my time yet she was so pompous she even wrote her name down for me to go and complain about her. She was bad and MTN will loose lots of customers if that woman does not change her attitude