I was denied a full refund.

I made a purchase from a Legit store in Joburg on 02/02/15. Today I wanted to exchange the item for something else so I went to the Boulders Legit store because it was near to me at the time. I couldn't find the item in store so went to ask for a cash refund. They refused to give me a refund saying I should I go back to the store from which I bought it from and get a refund there. I tell to her that I can't do that because that Legit store is really far from where I live but still goes on and tells me that she can't do it as it will affect their store's target sales. Fine then, I travel to another Legit store in Clayville. They also refused to even consider my return of purchase as they say that do not have the item in store so they won't do it. I was never informed of this is how things are done. Even on the back of their slips of purchase, it doesn't state that the customer should only return items to the store they bought it from. I even went on to call the Edcon customer care-line to get more clarity on this as I have never had this problem before, I could buy and return items at any Edcon Legit that was near. But instead I was patronized and not helped with my problem at all