Pathetic customer service

I had purchased a top for the amount of R149.99 from the legit store in stanger.After trying on the top at home I was unhappy with the fit as it was too small.The next day I went back into the store an returned the top an took a bigger size.Still unhappy with the way it fitted I decided to return the top for a refund of the money I had paid for the top.I went into the gateway branch on sunday the 01-02-2015 an was told very rudely by the store manager on that day that I could not get a cash refund and that she was only prepared to give me a gift card , because I had previously returned the top for size.When my top was exchanged the sale was done on the same docket.No where it is stated on da return policy that you are not allowed to exchange or refund an item more than once.As a customer I have a right to purchase and return an item with a valid docket which I did have.As a person in managment level Felicia should understand that there are ways to speak to a customer and being rude an displaying an unprofesional act in front of other customers is not acceptable.She should be trained on return policies and should know how to treat customers.I am very upset with her service.