Poor quality of shoes - no plausible solution

A pair of Dakotas was purchased from the store in Durban. This was on the 26th August 2021. My son wore it for 8 days as he only goes to school every 2nd week. The shoe has already opened up in the front and the sides. I took the shoe back to the store today and the manager Sibusiso gave me the ffg. options: 1. I will get refunded for R200 which means that i would have paid R400 for the shoes however, I would have to repair it myself 2. My son must wear the shoe until it opens up more so that they could give me a brand new pair 3. I could send it for repairs 4. They could try to get a brand new pair and I must pay R120 for courier fee

This is not acceptable