If the shoes at the counter break within a month of trying them on, you can exchange them for new shoes according to the three-guarantee contract. In your case, it is a quality problem with the leather of the shoes. Use the three-guarantee card to go to the counter and ask for them to be sent back to the manufacturer. Because the leather is damaged and cannot be repaired, the factory will return a new pair of shoes to you, but yours is limited to those purchased at the counter. After all, the price of shoes at the counter is quite high, so returns and exchanges are accepted