Poor Customer Service from Store Manager

On Sunday the 17th May I saw a lamp stand and shade and decided to purchase it. I asked the Manager, Jessica Williams, if I could please change the Green lamp shades on this lamp, for the Black lamp shades on a similar lamp stand. It was exactly the same lamp with a different pattern, same price as well. I explained to her that I wanted to purchase two of the lamps. All I needed was a simple exchange of the two shades, Black for Green. Upon meeting Ms William and explaining my request she immediately said no. I explained again that all I needed was an exchange of the two lamp shades and she kept saying no. The manner in which she spoke to me was appauling. Not once did Jessica make eye contact with me.Not once did she smile during our interaction.And not once did she say the words: \I'm sorry"All she kept saying was \""no\"""