bad after sales service

Our clutch failed the other day... our car is just under a year old. Kia took it in but is now saying its not 'wear and tear' its due to customer negligence and will not be cover by our maintenance plan and will cost 10k to fix...How is this possible in less than a year!?!? I now question what was sold to us in the fist place. I am disgusted at the after sales service as there is a complete lack of response from Kia. What is the point in having a maintenance plan! Our VW has never had a clutch problem nor any other problem in 4 years of ownership. This is just unacceptable from Kia!!!