Bad Service

So I bought sandals at Jet, and when I was at the store, the one I had while paying didn't have the barcode, so they had to ask an assistant to bring ones that have so they can scan the code. Weeks later, when I wanted to wear the sandals, I realized I was given a size 5 and 6 pair instead of the size 6 that I wear. I went into Zevenwacht mall to try and exchange a couple of weeks later, and was told I need to go to Tygervalley mall to exchange the pair of sandals. I asked for the manager, and she told me the same thing. Tell me, how am I expected to drive 30 minutes to a different mall to exchange R169 worth of sandals, as I live and work closer to Zevenwacht Jet? Please make it make sense to me, 'coz this week is my 30 days exchange policy week, so that means I am stuck with size 5 and 6. How is that fair to me as a buyer?