Waste of my time!

I came in to exchange items and got the exchange slip at the security guard by the door. I asked him if there are specific tills should I go to for the exchange, he advised 'any till'.<br> <br> I then went to the nearest till, stood in the queue for 20 very long minutes only to be told that I should have gone to the first floor for the exchange. The lady at the till was unsympathetic and uninterested that I was given the incorrect information. <br> <br> I went back to the security guard to tell him that he gave me the wrong information and he didn't care much what I had to say and about the frustration he caused. He told me that exchanges can be done at any till and that the sales people just didn't want to help me...he then just walked away and leaving me standing there.<br> <br> How pathetic?! Such customer service is unacceptable! <br> <br> What exactly is the process for exchanges and why do your employees have such bad attitudes?!