Bad service

The service I got from the cashier that was helping me was disgusting. It took her a good 15min to ring 3 shoes, she was chatting with her colleague who also was helping a customer, I didn't get the whole story as I was irritated, but they were complaining about a cake someone bought for them as employees. I was also returning some sneakers I bought the previous day, that also took its own minutes as she even left me there without telling me where she was going. She then came back, and slowly scanned the box (let's not forget that she was chatting with the colleague next to her at the same time), I tried helping her check the shoes as I knew that was her next step, to speed up the process, I even told her that I'm helping her so that she can finish quicker and that I'm in a hurry, she then became even more slower and said she has to look where the beeping sound came from (I don't know where the beeping sound and me purchasing the shoes connected), she would point at people with the scanner. You guys should know that there's other stores like foschini, Edgars to name a few, but what will differentiate you from the rest is service, I don't have to buy from you, but I chose you, don't make me choose otherwise. Can you imagine how many customers experienced the same service I did for only that day? Some customers won't give you a chance to fix your wrongs as I'm doing right now, they'll just walk away, you'll be blaming the economy while the problem lies with you.