Very bad attitude

I went to the bank with a good smile on my face but left with a disappointed face. The bank teller (Ayanda) looked like he was not interested in helping me. What he did he didn't bother to wear a smile and normally when I deposit I am being asked if the account number correspond with the account details,but instead he was all grumpy and didn't even greet me. Can you please correct this kind of bad customer service. Thank you