Rage shoe store birch acres (Thembisa mall) refused to exchange an item for me and I have original pack&proof of purchase

I received worse customer service at Rage store in birch acres on the 3rd January 2024 from one of the sales lady there I couldn’t get her name because she had no name badge in fact all the staff there had no name badges on them…I bought shoes there on the 13th December 2023 and I said to the lady before I paid I’m buying for my daughter who’s in Kimberly for xmas holidays and she needs to wear these on the 15th December so I’m not sure if thy will fit or not then she said no problem you can come or exchange that side if there’s rage then I bought the shoes.unfortunately the shoes didn’t fit her they were bit small and there was no rage near them so she had to wear them since she had no alternative pair to wear but only worn them for the wedding service then took them off(still in good condition) then I called customer care rage and explained the situation and that I would like to exchange for bigger side I even emailed the pictures because they asked to see them first before I can go exchange and they told me no it’s fine I can go to my nearest rage exchange them….so 3rd Jan I went to birch acres were I had bought them ,got there went to the tills nd asked to exchange for bigger size,the lady took the box&slip then went at the back office (didn’t say anything to me) comes back and makes a call to Palesa(I’m assuming it’s a manager) then she puts on loud speaker telng her there’s a customer to do exchange but the shoes were worn once and the customer claims she had spoken to customer care about the shoes and she’s got a print out of the email then from there I couldn’t hear or understand anything they started talking in their own language,laughing while I’m standing there on the tills then she hang up the call and started talking with the other staff (saying ama-customer ayahlupha) meaning some customers are annoying that line I was able to pick up&understand because I might not know all South African languages but some I do..so other customers could hear what they were saying because they were talking Pedi (I had to ask the customer next to me whch language was the lady speaking because that customer asked me ma’am what is the problem then I explained and the lady was shocked and said to me so why is the staff treating you like this,why don’t you go to another store whereby you can get help)

Then cashier gave me the shoe and slip back and she said we can’t exchange it for you and my manager the one I was on the phone with says we don’t have the same shoe then I was like but I can look around for another shoe to exchange with and It doesn’t have to be same amount I don’t mind paying extra as long as I get size:4. The sales lady said unfortunately we can’t exchange it

I was soo humiliated and upset that I decided not to argue I walked away…I got home sent email to *** and *** but no reply till today.