Refund declined.

I purchased an "adult, one size" tutu from King Cake in Parklands. I was rushed and this store happened to be closest, so I paid the R150 that they ask for a tutu. I experienced friendly service and everything was fine. I got home and realised the tutu is really quite small and will not fit most people. I had to leave town for a while and decided to return it when I got back. Upon returning to the store, I was immediately informed that they could not refund me due to their 7-day policy. It has been 13 days since my purchase. I explained that I could not return earlier, but I was not accommodated. There was no attempt to assist. Really super disappointed that their policy is more important than their customers. Would anyone like a tutu for their toddler?