2012 AUDI A6 Unknown Or Other Problems

I TOOK MY VEHICLE TO REPAIR FOR 2 RECALLS ON 2/22/21, THE NEXT DAY 2/23/21 THEY CALLED ME TELLING ME THAT I HAVE TO PAY $ 550.00 FOR THE REPAIR. ACCORDING TO DOWNTOWN AUDI TECH THE ECU OF MY VEHICLE IS DEFECTIVE BECAUSE THEY CANNOT COMMUNICATE WITH THE VEHICLE'S COMPUTER, BEFORE TAKING THE VEHICLE TO REPAIR THE RECALLS IT WAS IN GOOD CONDITION SINCE I CHANGED THE OIL AND CONNECTED MY SCANNER TO RESET THE MAINTENANCE MESSAGE ON THE VEHICLE DASHBOARD. THIS IS ABSURD THAT THEY WANT TO SCAM THEIR CUSTOMERS. NOW THEY WANT TO GIVE ME THE VEHICLE WITHOUT REPAIRING THE RECALLS AND WITH LIGHTS ON ON THE DASHBOARD OF MY VEHICLE, THIS IS NOT ETHICAL OR PROFESSIONAL.

MY MIL ( MALFUNCTION INDICATOR LAMP ) CAME ON, IN MY AUDI A6 2012 ON 1/21/18. I MADE AN APPOINTMENT WITH MY AUDI DEALERSHIP ON 1/31/18. I WAS INFORMED THAT MY TRANS COOLANT VALVE WAS LEAKING INTO A WIRING HARNESS. THEY REPLACED MY N509 VALVE AND WIRING CONNECTOR. I FOUND A TECHNICAL SERVICE BULLETIN REGARDING THIS PROBLEM IN MY CAR AS WELL AS OTHER AUDI MODELS. THERE WAS A RECALL FOR THIS IN AUDI A8 2010-2013. ( I HAVE INCLUDED THESE IN THE FILES THAT I HAVE UPLOADED.) THE AFFECTED A8 VEHICLES HAVE A COOLANT VALVE LEAK ALLOWING COOLANT TO ENTER THE ENGINE CONTROL MODULE CAUSING A LOSS OF POWER OR THE ENGINE TO STALL. A VEHICLE STALL INCREASES THE RISK OF A CRASH. I HAD MY CAR REPAIRED AS MY WIFE DRIVES THIS CAR AND I CERTAINLY DID NOT WANT THE CAR TO STALL AND POSSIBLY HAVE A CRASH....