Defective clutch when purchased

Purchased new Audi April 2013. Clutch defective frm date of purchase. 25000 km later clutch failed again. Now Audi is passing the buck saying that it is driver negligence. Car still under warranty . Vehicle has been at Audi for last 2 months. No assistance or proper answer frm Audi SA or Audi Northcliff as to why car had defective clutch when purchased. Absolutely Poor service & no response to emails or phone calls timeously. I am refusing to pay for the repairs of this clutch as it was defective frm date of purchase. Queries escalated goes back to same individuals that cannot assist . Frustrated with assistance received frm Audi. Await urgent response frm the right individuals at Audi. Will absolutely not pay for audi's defective parts. I have been driving for more than 30 years & have never had issues with driver negligence. ....