Worst car service and worst customer experience

Worst car service and worst customer experience

1) I brought Chevrolet Enjoy from dealer. When i went to RTO for registration they found that the car is actually manufactured in the 6th month of 2016(by decoding chasis no:) but in documents from chevrolet stating that it is manufactured in 11th month of 2016. I have notified this to chevrolet and the dealer but nothing has been done by them so far.For them these kind of scenarios are usual. Does filing a case in consumer court will help me ? 2)There is always air squeezing sound from the engine whenever i press on the pedal and there is a whistling sound from the engine when i remove my leg from the pedal.i notified this to the dealer,but they are saying that it is usual sound for the chevrolet enjoy and can be found in most diesel MPVs.can somebody help me to identify what exactly is the problem is. From my knowledge air squeezing sound may be because of some air leak in to the engine hood and whistling sound may be because of weak tension of the belt in the pulleys.