Anyone else experienced this. My Unisa shoes, hardly worn are crumbling. Wedge sandals, went out in them yesterday and they felt odd. I only checked them on arriving at John Lewis, they were pretty dangerous. I had to buy some new shoes to get home. Told Unisa who said as I no longer have the receipt for these hardly worn shoes they couldn’t help. Beware if you wear or buy these shoes. At best expensive non durable footwear, at worst a nasty accident or fall.