Unfair and Customer Sercive negligence by pep store

@PEPstores_SA -i bought a top 2 days ago at Lephalale Mall pep store .Now this morning when I was wearing the it I realized that the front was sawed inside-out. I couldn’t find the payslip but still had the price tag ?. So now they can’t assist me because I dnt have the slip whereas they can see that it’s a simple shop faulty top which I jus needed to exchange. So now it’s my loss?? #. That is so unfair pep, what must I do with the top now??. I called the customer care twice to complain, a nice lady on the call told me the area manager will call me to assist, even now I’m still waiting for that call. It’s not fair that I cannot return a faulty product when it’s obvious that I bought it there.