Terrible customer service

I was very disappointed with the service I received by Jill in customer service at Gateway. I purchased a Tom Ford fragrance amongst a lot of other things. I was told at the Tom Ford counter I could swop the fragrance if I didn't like it. I smelt the tester and did not like it. When I tried to exchange the unopened fragrance with my slip two days later I was told I would have to pay in R500 for the same product. Jill was very rude, condescending and dismissive of me in from of my children and other customers and I still have not resolved the issue.