repeated damages

took my h100 for a major service. the vehicle came back, not even 500km later the prop shaft broke, when we took the car back, they stated that the diff ran out of oil( not checked at th MAJOR service). 3 weeks later we got the car back. We did about 400km and the gearbox broke completely. we were told again the diff had no oil(once again not checked after the prop shaft was done). they tried to make us pay for a new gearbox. we met have way and paid 50%. 4 weeks later we got the van back. during these 4 weeks we had no feedback from hyundai of the progress of the vehicle. We did less then 10km and the clutch broke completely. and they now are still trying to blame us.