Terrible service from staff at Pep Bothasig

On Saturday 7 January, I purchased some school items from Pep N1 City. With my slip, item in its original condition with price tag and all I went into Pep Bothasig for a simple swop in size in long grey school socks. I took the correct size and headed to the tills, no queue, so something so simple that should've taken 5 min took almost 30 min because I needed to fight with *********** staff and so called policies.

Because the socks returned was R34.99 and socks I was taking was R32.99. They wouldn't give my original slip because they must give me cash back and I won't take something else. That is completely unacceptable. What kind of policy is that. I provided the proof of purchase, item in original condition. It's my slip why must I give it. And you can't force me to take something else. So if I need to return something else on the slip I wouldn't be able to because they won't give my slip. Really. If this is your stupid policy get a photocopy machine so you can make a copy for yourself. When I asked cashier Nawaal for a manager, Fudwa - 2IC (not sure if I got her name correct) but she was the highest level of management available she came with the same story. Eventually after arguing she added a packet of chips in order to give my slip back. I nicely asked her to get her manager to call me. Then I got very irritated how she kept brushing me off and told me I must call when the managers around or call customer care because they going to tell me the same thing. As a customer I asked for a manager to call me because I don't agree with this so called stupid policy. After wasting 30 min of my time she wants me to call around and run after management. She walked away and I had to stop her and ask her to take down my number for the manager to call me cause she simply ignored my request. To date Gina(manager) and area manager has still not called me. The service is really disgusting. Policies and assistance from staff. Pep is a massive company for a query to be handled in this manner is really pathetic.