Disgraceful staff behaviour

About a month ago I visited the Pavilion branch and received, once again, the most ********** service ever. I needed to exchange a pair of Nike tights and there was a price difference, where the new pair was cheaper and instead of being refunded the difference, I was asked to make further purchases to cover up the difference. I had just done this at the Gateway branch and I was not about to buy more items which I don't need yet again. The cashier got a supervisor, Valencia, to assist. This woman has the worst attitude and even went to the the extent as to continuously raise her voice and argue with me. I asked her twice what the price difference was between both items, both times she just stared at me blankly and continued doing whatever she was doing ans kept ignoring me. Upon the third time of me asking the same question, she gives me a till slip to sign without explaining what it was that I'm signing. That's when I became extremely irate because I've now asked her numerous times with no answer. The fact that she would go to the extent and argue with me when she was the one who was extremely disrespectful towards a customer. Furthermore, I had to request the names of her and the cashier and none of the store staff wear name badges. Only when I asked Valencia for her name, then did the cashier take her badge out of her pocket and put it on. I have now changed my Discovery Vitality healthy gear option from Total sports to Sportsman's warehouse because of Valencia's heinous behaviour and utter disrespect towards a customer