Beyond shocking service !!!!

I am BEYOND DISGUSTED with the Complete and utter INCOMPETENCE of this dealership. My vehicle was taken in on 11 April and diagnostics checked to see problem. New ECU and wiring harness needed. We were **** to about this part being ordered on the 11th and then the 19th only to hear the part was only ordered on the 29th!!! No updates or communication were given, and when asked when the vehicle will be given back, excuse after excuse was made. The vehicle is on motor plan, therefore we should receive a courtesy car in place. This wasn’t the case, excuse after excuse once again. It is the 6th week not having my car, and they have not even touched the vehicle or started working on it. The dealership cannot even grant an accurate date of the parts’ arrival. Completely and utterly disgusted at a so called “luxury car-brands” treatment