Ackerman's store at Protea Gardens conducting ******** like behavior

I bought a cellphone at protea gardens on Tuesday 12th of August 2021, the reason I bought this phone was because I needed it for work and only to find out 2 days later it doesn't support my company's software and I went back to the store and asked if I could exchange this phone with another one, they refused to assist me to exchange the phone even though I still had the slip and everything was still in order, now I am stuck with a cellphone worth 2k and I cant use it for work and I wont be able to report for work tomorrow because I don't have the proper requirements. at this point I want my money back so I can buy from a retailer who cares about the life's of their clients and when I bought the phone they told me I had 7 days to exchange the phone, but now they reneging on that promise and in my view its not only ********* but its just borderline ********,