Maintenance department incompitance

Good day My name is mmusi Mampheko a vw customer of a new car owner that recently took the car in for service. And on before that had my brake pads changed at the dealer, and have noticed one of the lock nut's missing on the front left tyre. This issue has been escalated up to the manager that refuses to take liability of replacing it incurring the replacement cost on me. The manager has told me that all their inspection we're done yet not one of them can prove that everything was in order nor on recipe or pickup. The car is still under warranty secondary service was been done when this was noticed. VW midrand has proven to be *************, and careless as they are putting liability on us as customer for their incompitance. Now VW midrand should replace my lock nut's as they are the ones responsible for all maintenance on this car. On advise please check or inspect your assets very carefully when collecting from this dealer don't be at a lose.