Bad, disrespectful attitude and bad customer service

The level of poor customer service and attitude that I encountered at Sportscene in Kempton Park, festival mall is utterly shocking from the proclaimed supervisor himself by the name of Katleho. On the 16 November 2018 I went to purchase some black demon jeans at Sportscene in Greenstone , I bought the wrong size which was size 30 and immediately went in to change or refund for a smaller size 28. Now Sportscene in greenstone did a straight swap and not a system refund. The following day I realized that I no longer need the jeans and took them to Sportscene in festival mall. On the immediate I was told they would not refund me because of what greenstone did not follow the correct process of exchanging. Now how the **** is that my problem, Katleho and his subordinates told me they won’t help me even if I called customer service I will not get assistance, behind the counter there was another guy busy chatting and saying he always sends back his customer who encounter such , with a bad attitude. I spent almost an hour there with refusal of a refund because Katleho told me I might have ****** the jeans , even with my proof of purchase and content. I then asked him to call greenstone and verify my purchase. He took his time and came back with the same answer that he will not assist me I must go do the refund where I bought my jeans. This is purely bad customer service because even they do not listen to the customer but they tell the customer. I insited that I he show me where in their policy that stipulates that I cannot refund in that instant. Until I took down his name in order to contact customer service that’s when he assisted. It is to my knowledge that the behavior and attitude is the same to all customers and clearly Katleho isn’t equipped to run that position as a supervisor because he’s rude and disrespectful along with the other male staff member, with the same mindset and attitude, that is not how a customer should be treated, they should have refunded me to begin with and then they liaise with the store that didn’t follow the correct method of refund. Please look into it because it is a problem. I write this with utter shocking and actually ****ed.