Bad customer service

I am so disappointed and frustrated with woolworths Canal walk service. I was at the store on Friday 26th September wanting to exchange a birthday gift my daughter received the label was still on the shoe I never had a receipt, when I got to the till to do the exchange the item scanned 0.01 and the consultant jaydeen told me that I am unable to exchange it because it's off. The system. How is that my problem? I was exchanging the shoes for something else and something that costs more, I didn't want the money back I just wanted to do a simple exchange because the shoe was to small for my daughter. And now my daughter has a shoe that is to small for her and that will go to waste. Thanks woolworths for the worst customer service ever. If I had gone to any other retail store I would've gotten an exchange, and before going to woolworths I went to Ackermans and Mr price, to do an exchange for birthday gifts that was also to small or to big and they helped me with a smile and they assisted me. At woolworths they gave me **** service not even willing to help me.