2000 AUDI QUATTRO Engine And Engine Cooling Problems

AUDI-A4 TIMING BELT BROKE WHILE DRIVE ON THE FREEWAY. ROUTINE SERVICES WERE DONE AT STEVEN'S CREEK AUDI ON A REGULAR BASIS. AUDI SERVICES NEVER REPORTED TIMING BELT PROBLEM IN ALL ROUTINE SERVICES. MY AUDI HAS ONLY 47,000 MILES AND WITHOUT WARNING, THE TIMING BELT BROKE. LUCKILY THERE WERE NO MAJOR INJURIES WHILE DRIVING ON THE FREEWAY. NOW, AUDI INFORMS ME THAT IT WLL COST ME $10,000 TO FIX THE TIMING BELT AND THE REPAIR OF THE ENGINE. IT IS NOT ACCEPTABLE THAT I HAVE TO PAY FOR THE REPAIR WHEN I FOLLOW AUDI ROUTINE SERVICES. ADDITIONALLY, ALL MY SERVICES WERE DONE AT A CERTIFIED AUDI DEALERSHIP SERVICES. AND IN ALL OF THE SERVICES, NOTHING WAS EVER MENTIONED REGARDING THE CONDITION OF THE TIMING BELT. HAD AUDI SERVICES INFORMED ME ABOUT THE CONDITION, I WOULD REQUEST TO REPLACE IT. IT'S A DEFECT THAT AUDI KNOWS ABOUT WITH REGARD TO TIMING BELT...