Pathetic after sale service, less knowledge of cards

I have a bed experience with woolworths in Pavillion on the 20th of August, someone purchased a shoe for my daughter and gave the slip and i didn't like the actual shoe, and i wanted to go and buy somewhere else, the gave me a run around and want that person's sensitive details like a picture of a card number, I complain to customer service but i didn't get a good answer, where even at the back of their slip nothing states that if u return something u have to bring ur card In short after service it bad, woolworths doesn't wanna lose any money, the person has to drive down from PMB and charge the shoe, telephonical a friend confirmed card which was a Visa Debit Card, no but they wanted the picture, Cause the slip is written Visa my Goodness a Visa doesn't mean it a a credit card, in this society of ***** how can u send a sensitive information like that I was so disappointed with their service, and not so it was the colour of my skin or what?