CHM Isuzu dealer in Boksburg

We bought a rent to own car last week, Peugeot 208 to a consultant name Linda. The vehicle within 3 days already has a mechanical faults, we were told that the vehicle went for roadworthy before it was given to us. We requested a roadworthy certificate from Linda, it has been a week now we haven't received that roadworthy certificate from her, she keep saying she will e mail it to us until to now we haven't received any documents from her, clearly this vehicle has not gone for roadworthy hence it was stucked on the road while my fiance was going to work with a mechanical fault, this vehicle was not even taken for service as well while given to us, vehicle is due for a major or annual service at the end of this month. How possible is that you are given a vehicle that is showing warning lights on the dashboard that is due for service, why the dealer did not take this vehicle for service first before given to a client?