Went to the shop at the Stow in Harlow to change normal nappy to pull up nappy. At the entrance, I spoken to a male staff who said it cannot be exchanged without the receipt. I went to my car to put the nappies at the boot to return back to the shop to buy fruit. I was approached by a staff and a security man to demand receipt. While trying to explain the situation to them, the manage at the store who I believe is Eastern European origin just jumped in the conversation and said loudly that, her staff can demand for receipt of purchase at anytime making everyone at the car park looking at me. I walked with them to the male staff I enquired about exchanged from who confirmed I walked into the store with the trolley with the nappies inside. I have never felt humiliated in my life before this incident and I believe this was because of my race. I wanted to complain to the manager and to my surprise it was this rude and loud lady. While trying to express my disappointment, the manager who I believe does have good customer relations asked me if I want to talk to her as an adult. I just couldn’t waste my time talking to her and took the number for customer service to make complain. The customer service agent was very understanding