Clutch Kit

Hi, Last year we replaced a clutch kit on our GMW Steed 2.8 TCI Lux D/C ( -100000km) with GWM Gezina. Firstly they ordered a part for us and when it arrived it was the wrong part. Then they ordered the correct part, but it would have been shipped from overseas as there wasn't stock is SA. The next day they phoned and said the service manager found the correct part and they will fit it.We received the car back and the claims was done through Innovation. After a while I felt the gear are harder to find and sometimes struggles to get into gear. We took the car in for the 120000 km service and asked that they look at the clutch for us. We were told it only needed transmission oil, after a few km's the same problem started again.So, I took the car to Car Service City Pretoria North to check the clutch for us as I lost trust in GWM Gezina regarding the continuous clutch problem. They stripped the clutch and found that the Flywheel was skimmed incorrectly and therefor only part of the clutch plate worked and by this the clutch plate was damaged and we need to replace the complete kit again. This after 30000 km. Innovation rejected the new claim.Now who is responsible for the replacement?