Skechers Product Quality Issue: Unusable After 20 Uses

I bought a pair of Skechers shoes and the inside of them completely fell apart within a year. I only wore them about 20 times, so now they're impossible to wear. I brought the product to the store, and they sent it for inspection. They said it wasn't a mistake on their part and they couldn't help with it. I didn't just buy this product from any old place; I spent a decent amount, thinking it was from a trustworthy brand. I'm not going to buy Skechers shoes anymore.