Don't wanna exchange product - Consumer Complaint for PEP STORES

I bought a size 46 short as usual in one of your stores in giyani mall.. It was on sale for R69. 95,it does not fit me well the way I want it to be in fact I'm not comfortable on wearing it. I can't find my slip now they telling me I must give it to someone else because they ont exchange or take it back so I left it in store. Because it's their product they telling me that I'm not fair. So is this how u treat your customers