Do not want to return damaged goods

My wife bought herself 2 beaters at Pick n Pay Vredenburg on 3 November 2015 at till no 7. The beaters are damaged and she wanted to return it. Unfortunately she lost the till slip and they do not want to refund/replace the damaged goods. I think they could have done more to help a loyal customer by checking the video footage of till no 7 at the morning hours of 3 November 2015. She have her own bakery business and 80% of our shopping is at Pick n Pay Vredenburg.