Bad service with ridiculous process in place that affect customers.

Bought clothes there for my nice on Friday 23rd at Selcourt Towers. When I got home I realised that the dresses were too small. Went to their store in Springs Mall and did not find the correct sizes. In the whole process I lost the till slip. When I went back to Selcourt towers I was turned down since I no longer had the till slip. I produced my bank statement as proof that I did make the purchase but was told that I need to go and get someone who will buy from me as they will not change the dresses to correct sizes. I find that very ridiculous as I don't want my money but want to exchange. As for being told to go and sell myself. I'm sure that's not how you have trained you staff. I need these dresses exchanged and I'm sure that won't bring the whole of pep down. Really? That's a very bad service as pep should have enough measures in place to assist their clients.