Hogging my money instead of reversing it as they stated

I went to American Swiss Fourways Mall on the 29/09/2024 and I was assisted by a nice lady(initially)named Gugu, but I ended up buying something way too expensive by mistake and I came back to revert my cash for that transaction and gave back that expensive item I thought it was different price (based on how the price was communicated to me(jargon) by Gugu i.e. R9050 stated as nine fifty). I was then on the day told that the money will reflect back in my credit card account within 3 working days, It’s been 7 business working days now and my money is still not back into my account, I am told that the American Swiss account people don’t deal with just my one account so I have to wait and I am currently incurring interests on my credit card of something I don’t have. Please don’t make the same mistake as, the way those people communicate with customers, it will make you feel like me(as if they are doing you a favour) while they are hogging my money and disadvantaging me.