Not flexible for exchanges

My sister bought a gift for my girls end of June. Unfortunately we could not have them fit their garments until 15 July due to us living in different provinces. I opened the items and noticed that they do not fit the girls so I immediately contacted Chepa for exchanges. I was told I could not exchange as good were received more than 10 days or so and that I should have made sure that I check them before 10 days. I tried to explain that it was not possible and I'm only asking for a different size and not a refund but I was told I must pay R400 for the different sizes to be exchanged. No matter how good your items are, but of you're unable to provide flexibility to your customers, you will lose support. I'm no longer buying from a store that does not allow exchanges. To put the cherry on top, they removed my bad review from their site.