Poor Customer Service

I went to the Ackermans store in Witbank down town. I had my son try on 3 pants I intended to buy him. As we got the till paypoint. I asked the lady to check the total price for me before I could buy to stay within my budget. The Ackermans employee rudely and loudly asked why I did not use my calculator to check the total price. Before I could explain that I did have my cell phone with me. She added sounding annoyed that why I did not ask my son to check the total price for me. My son who has ADHD told her that he was busy browsing around in the store. The lady then said if she checks I must pay for all 3 items I agreed under pressure and just wanting to end the noise and tense situation. The lady had a name tag written Barbara. She had a pony tail. I left and came back shortly afterwards as I realised that one of the pants were not the required colour and size for school. As I approached the till point again Barbara seeing me come to her till desk just stood there staring at me not saying a word. I hesitated and went to the next lady. Barbara's body language indicated that she did not want to help me. The second lady named Mpumi was just as unprofessional. She asked me why I did not check the pants size before buying in a degrading bad attitude. I told her I did. Mpumi first turned and looked at Barbara before treating me with disrespect. These 2 ladies are unprofessional and should not be in the front desk dealing with customers. Can Barbara and Mpumi be taken for good customer service training as they will tarnish the image of Ackermans.