Audi India Pvt Ltd - Faulty car sold

I'm the owner of Audi A*. On *th Aug'**, I had got the regular service done for my A* car at the authorised service center at Hyderabad, India. My Audi A* car no.AP **DH **** and it has run only approximately ***** km to date. The service bill was approximately Rs.*****/- which I paid. On **/**/** my A* car suddenly stopped working while I was on my way to the airport. I called the local authorized workshop and they suggested that I send the vehicle to their workshop. I had to hire a tow truck and send my car to there incurring unnecessary expenditure. It was a harrowing experience. Moreover, we missed the flight causing huge loss of business. I sent my A* to the dealer in Hyderabad, India (Olympus Motors Pvt Ltd) to get it rectified. For * days the mechanics did not revert back to me. Finally after much follow up from my side, they reverted back stating that there is contamination in the fuel system due to which the car has stopped working. To rectify it, they gave me an estimate for a whopping sum of Rs.*,**,***/- (Rupees Eight lakh eighteen thousand three hundred forty-six only). I really suspect foul play since I had got it serviced just a week ago. I want to know from you as the manufacturer if Audi company is selling sub-standard quality cars in India? Have I made a big mistake in buying Audi vehicles? I'm feeling really CHEATED. Audi is owned by Volkswagen who cheated the whole world on emissions issue so maybe they are used to being cheats.