The clutch of my Seat Ibiza was replaced by a well-known 'specialist' clutch replacement company. The original clutch had lasted for 85,000 miles. The thrust bearing of the first replacement clutch failed after 3200 miles/three months. It was replaced under warranty. The second replacement clutch failed after 900 miles/14 days. The company declined to replace this clutch under warranty citing 'signs of vehicle abuse'. As far as I can see, the reason for failure appears to be severe wear of the clutch plate.

My questions are: What sort of 'vehicle abuse' would have to occur to lead to this sort of failure after such a short time? Are there any possible alternative explanations such as the parts being of poor quality or the installation being faulty?