Pathetic manager @ Fourways Mall MRP

I visited MRP Fourways mall yesterday, There was a jersey marked down from R179 to R100. So i took a medium as the one with the marked down price was an XL. I went to the till and explained to the cashier who then said the items were different as the codes were different. but after he looked at them he and another staff agreed they were the same. He then said he would discount it, he called the manager and thats when everything went haywire. She came to the till and spoke to my partner even though i was the customer. After explaining to her she advised that the items are the same but they from different stock so they cannot discount it. How does that make any difference? its the same item and on the same rail? she was totally rude and didnt care, she was abrupt with me and had an attitude. i asked for the regional managers details and wasnt provided with it. Eventually due to the pathetic service i received from her i decided to cancel my account that i have with you for 10 years, She didnt even care she just clicked her tongue and walked away. The guy eventually gave me a form to fill which i did and i waited for him to tell me that everything was done, he also saw me waiting and said nothing, eventually i called him to ask if he was done and he said long time, so i stood there for an extra 10 minutes due to a lack of communication from your staff and a dont care attitude. I am sure there are cameras in your store, please view this. You lost a good customer and i will ensure you lose more all because you appointed staff that dont want to be at your store.