Cant respond to a query

On Friday i went into your store and wanted to purchase a few items for my son. I got to the till and was asked by the sales assistant if it was the correct size, i said im not sure and she rep**** that should i want to return my goodies i will not get a cash refund for it but they will credit me with a gift card, apparently thats their new policy, i asked why and she couldnt answer me, i then asked to speak to the manager who one took his own sweet time and 2 didnt even have the decency to apologise for keeping me waiting. When i asked him to explain the policy he couldnt do so ever. Eventually they came up with some story about it being to promote gift cards. Really, promote gift cards at my expense!! i dont think so, i would really like to know why they have this policy and they cannot give me an answer. And as for the manage Dashan he has a ****py attitude and does not know how to respond to his customers. It is the worst policy i have heard. I spend a thousand rand at your store and you want to give me a gift card instead of my cash should i want to return my items.