Extremely bad service

I'm extremely disappointed with the service that I got from ackermans. On Friday went to ackermans in wonderpark to buy tracksuit for my baby size 18 - 24 but when I got home I saw the pants were size 6-12 . On Sunday went to ackermans Soshanguve Plaza to exchange they refused to help me I was told that I had to go back to the store that I bought those tracksuit. I then called ackermans in wonderpark I was told I need to come back to them to exchange. I asked them if I bought the tracksuit in jhb was I supposed to go back to jhb then she rep**** yes.