Repairs needed not done, costing us R12000

I sent my Maxi Caddy into Tokai VW for a 90 000km service on 22-10-2015. Not only did I receive shocking service with my car only been half completed when they called me to collect it, not to mention I am a plumber running my own company so time is money, I had to take my car back in on Monday to be completed, keeping me out of work for close to a week. I requested my clutch be repaired as it had a bad shudder and they claimed it was fine. 1000km after my service the clutch is in a dangerous state and needs to be replaced for almost R12000. According to Stellenbosch VW this shouldve been replaced and they confirmed they can hear the noise it makes and is dangerous. VW refuses to have this sorted out. They claim that the company that provides the maintenance plan declined the request but they shouldve motivated it at the time and insisted that it needs to be replaced. VW was negligent in this case and irresponsible. The customer service at this branch is shocking!!!!