Maruti Suzuki India — maruti ertiga clutch plate

Address:

Mumbai City, Maharashtra, 400064

I braught ertiga zxi car in feb 2013 from m/s kiran motors, ahmedabad. My use of this car is less, i used it for 8000+ (Eight thousand) km only. Last week, while going to mahabaleswar (Maharastra). I felt smell from engine. I got the vehicle checked at local garage (No maruti service centre at mahabaleswar), they told me that the clutch plate got totally worn out and need to be replaced. As i donot have any alternative, i got it replaced by them and they charged me rs 8, 500.00. Now tell me why the clutch plate got worn out after usinf 8000 km only??