Refusal to exchange my goods

Yesterday I went to Edgars Active to return the tekkies that I bought. There was no one at the till, the manager was on the phone regarding, you can hear that she was talking to her friends. Finally when someone came to assist, I was told that I have to go back and come back tomorrow as they are offline. The manager came with her stinking attitude(attitude that you only find at government institutions) to tell me that I have to go back as they are not working because they are offline. I requested them to keep the shoes as they are in a big box, I cann't walk around with that box. She refused and told me to go. I have a very loyal customer of Edgars, paying my account on time. If this is the attitude that you service your customers, I'll be closing my account. I asked for the head-office number to report them, she gave me an incorrect number. I want that manager when their systems are on-line to come and fetch the tekkies and do a refund. I don't care how she does it, whether she sends a courier or one of the employees. I will not be treated like a piece of trash. Take your managers for customer service course.