Charged for order

I went to buy my daughter a pair of trainers. They had one pair only, which was the right size, but they were damaged. I asked if they had another pair, which they didn't. They said they can order from another branch. I told them fine, i would wait for a few days. They then asked me to pay R30 for the order, which I did. After a few days, they phoned me and told me that they arrived. I went there and paid full price for them. I, being in the retail business myself, don't understand why I should pay R30 for the order. When a client needs a product we are out of stock on, it is our job to get the product at our own cost, not the clients! Pathetic *******! Are you so desperate for R30!