NHTSA Complaint #11300420 — 2013 CADILLAC ATS

I TOOK MY CAR IN FOR SERVICE ON JANUARY 8, 2020 TO SOUTHTOWNE GMC IN NEWNAN,GA . I WAS HAVING PROBLEMS WITH WHAT APPEARED TO BE THE TRANSMISSION. I TOLD THE SERVICE PERSON MY CAR WAS TAKING A LITTLE TIME ONCE I PUT IT IN DRIVE MODE. THE SERVICE GENTLEMAN TOOK A HAN HELD DEVICE AND PLACED IT UNDER THE DASHBOARD OF THE VEHICLE AND TOLD ME IT WAS NOT DETECTING A PROBLEM. HE CHECKED THE DASHBOARD AND NOTICED THE CHECK ENGINE LIGHT WAS NOT ON. I TOLD HIM I WANTED A DIAGNOSTIC TEST DONE, HE SAID SINCE IT WAS NOT DETECTING A PROBLEM IT DOES NO GOOD TO DO A DIAGNOSTIC. HE NEVER INFORMED ME ABOUT PROBLEMS WITH TRANSMISSION WITH THIS MODEL VEHICLE. HE TOLD ME THERE WAS NOTHING HE COULD DO, THAT HE WAS SWAMPED WITH REPAIRS AND THAT IF I WANTED HIM TO CHECK MY TRANSMISSION I WOULD HAVE TO COME BACK IN MARCH. I WAS ABLE TO DRIVE THE CAR AWAY. ONE WEEK LATER THE CAR BARELY MOVES. BARELY GOES INTO GEAR. I HAVE NOT DRIVEN THE CAR SINCE JANUARY 15, 2020. CAN I GET SOME HELP PLEASE.