I'll never shop at Zara again, terrible customer service.

Worst customer experience I've ever had from a retail store. I'm very dissaponted about service at Zara Gateway mall. I bought my brothers and dad gifts 2 weeks ago. Gave them their goodies unfortunately my dad's cargo pants were big and he asked me to exchange it for him. Today I went there and asked the cashier to print a slip as the other one got misplaced when they were trying their clothes. They told me that they don't do reprints, it's against their policy, they don't do exchanges or refunds. I Then asked about the secondary slip they tear off to keep, her response was that they don't keep them after sales, the one I leave with is the only slip. I then asked how they do their inventory. She said she can't help me. Now am stuck with pants that are a big size and all I wanted to do was is an exchange. I bought the pants with my card but they still didn't want to assist me. They could scan pants I bought to exchange. More so because it' was still under 30 days since purchase. Fast forward to when I finally found the slip and they told me that they start counting days from the day of purchase. So I've wasted petrol money 3 times driving from Pietermaritzburg to Umhlanga and I'm still stuck with a pair of pants that are too big. I've never had such a hassle from other stores before just for a size change. After this experience I am sure of one thing, I'll never shop at Zara again.