Bad customer service at Old Mutual Benoni

I arrived at Old Mutual Lakeside Mall branch at 16h40 for business. I was informed by the lady at reception that I needed proof of residence to process my request, I immediately called my husband who was in the parking to quickly bring it for me while I was in the branch. The lady at reception then left her desk, and I waited. My husband came with proof of residence at 16h50, the lady at reception was not yet back. We waited until 17h00 and we then asked one of the consultants in the cubicles to check the receptionist for us. When the receptionist finally came back she said it was closing time and they cannot help us. I complained that I have been waiting for her since, then she called the manager by the name of Nomasonto. When the manager came she did not even greet us she rudely said that she saw my husband coming in at closing time. She was very loud and talking to the receptionist, ignoring us but addressing us. She said we must just tell the truth and humbly ask to be assisted because we came in late. She did not even afford me a chance to comment and when I tried she became more loud and rude, and made us feel belittled. The receptionist got hold of the consultant by the name of Katlego who was very friendly and helpful, who assisted us. Now I wonder if a branch manager can be so rude and unprofessional to a customer who has invested four products in old mutual, is this a reflection of the core values of the company? The decision I have to make now is to whether to withdraw my investments or to continue, hoping that this bad attitude will be corrected.