Bad client service Absa Waverley

I want to log a complaint against Brenda Khosa from the Absa Waverley branch. I took my mom, 82 years of age, to change her stop order. Brenda greeted my mom, but she spoke so softly we could not hear her. She refused to help us until we greeted her. Then she spoke to her colleague sitting next to her in her own language so we could not understand. My mom, having a hearing problem, asked me why the woman was not helping us....? Then suddenly Brenda started typing something on her computer to process our request. I told Brenda she was rude and I was going to log a complaint and she answered that she did not care. We left Absa after 20 years and my mom has been with Absa all her life. If you do not give better service to your clients I will not hesitate to take her business away from you as well....