Unsatisfactory service

I have recently bought a new S4 vehicle at Mahindra Rustenburg and I am unhappy with the vehicle itself and the service I have received thus far. I firstly had a problem with the engen within two weeks of buying the vehicle which was fixed. I then had a problem with my shocks just under 20 000 km and this car is not used for heavy or any type of lifting. Now recently my vehicle has been in for repairs at Mahindra for 4 weeks and for a mere wheel bearing repair which cannot be fixed, I then requested for a courtesy vehicle which I was denied as this matter is under warranty and I use the vehicle for my company which offers an essential service. From this my company has lost thousands which cannot be claimed back. it is disappointing to be a victim of such a service and vehicle.