2008 CHEVROLET MALIBU CLASSIC Structure Problems

WHEN WE PURCHASED THE MALIBU LTZ V6 FULLY LOADED , LEATHER SEATS ALL THE UPGRADED OPTIONS I THOUGHT I WAS GETTING A "EXCELLENT" CAR. I WAS DELUSIONAL ! WITHIN A COUPLE OF MONTHS I HAD A PROBLEM WITH MY RADIO, AND COMPONENTS IN THE RADIO SAYING" AUX INPUT DEVICE" AND IT KEPT TURNING ON AND OFF ! I CALLED CHEVROLET IN GREEN COVE SPRINGS FLORIDA AND ASKED THEM ABOUT IT AND THEY SAID IT WAS "NOTHING" IT WASN'T NOTHING ! I WAS TOLD OF COURSE "AFTER MY WARRANTY EXPIRED" THAT IT WAS THE ELECTRICAL SYSTEM! AND THAT I WOULD HAVE TO PAY MORE THEN $3,000 TO FIX IT! NICE GM! BECAUSE THE ELECTRICAL SYSTEM IS WIRED INTO THE RADIO SO WHEN THEY RADIO HAS A PROBLEM GUESS WHAT LADIES AND GENTLEMEN ? EVERYTHING GOES TO HELL ! ALSO MY MOTORS ON ALL MY DOORS HAVE FAILED AT LEAST ONCE AND...