Rejected warranty claim

We bought a car from We Buy Cars in December 2022. My daughter (a new driver who does NOT sit on her clutch) has driven the car approx. 8 000kms. When servicing the car in Dec 2023 we were told gearbox leak, clutch cable needs to be replaced. Innovation Group has declined the claim to pay for anything claiming wear and tear. We have seen the Dekra Report which states everything is in Very Good condition. When sending an email to the Ombudsman, we were sent a dismissal letter in less than 5 minutes (meaning nobody actually even read our email). How can a car need replacement parts in 8 000kms?