2010 AUDI A5 CABRIOLET Engine Problems

ENGINE LIGHT CAME ON WHEN STARTING CAR, HAD SOME DIFFICULTY ACCELERATING. CAR TAKEN TO DEALER WITHIN 24 HOURS. DEALER DIAGNOSED TIMING CHAINS, HEAD, TENSIONERS AND TURBO NEEDED TO BE REPLACED. CAR HAS APPROXIMATELY 83000 MILES AND HAS BEEN SERVICED AT CONSHOHOCKEN AUDI SINCE PURCHASE FROM PRESTIGE LEXUS (WITH 7000 MILES). AUDI HAS "OFFERED" AN 75% DISCOUNT ON PARTS BECAUSE I "HAVE BEEN A GOOD CUSTOMER" (EXCEPT THE TURBO WHICH THEY SAY IS NOT A FAULT OF THE ENGINE DEFECT). I AM RESPONSIBLE FOR 25% OF PARTS, ALL TAXES FOR ALL PARTS, AND LABOR. WHEN I CALLED AUDI CUSTOMER SERVICE TO QUESTION THEIR RESPONSIBILITY AND ASK FOR ADDITIONAL FINANCIAL SUPPORT, I WAS WARNED BY THE AUDI CUSTOMER SERVICE REP NOT TO CONTINUE TO SAY NEGATIVE THINGS ABOUT AUDI OR THEIR OFFER OF 75% WOULD BE TAKEN BACK. THIS IS NOT ONLY AN EXPENSIVE REPAIR BUT A SAFETY CONCERN B/C YOU CAN...