Bad service

I have purchased some shoes at Ackermans, wore it for half a day and the shoes started tearing at the back,very embarrassing.I took it to the Tygervalley branch and were told at the door that if i do not have a slip or the bag that I did the purchased in, they cannot do an exchange for me.I told them how was I to know that the shoes will tear the first day that I wear it and i did not keep my slip. I had to turn around without any manager or supervisor attending to me.