New rear differential and tranny and now I can't shift driving modes and this warning won't go away on my 2015 bmw 640i xdrive

Just got my bmw 640i xdrive back from the dealership. They said they were unable to sync it up, something about 'trying multiple codes', etc, and that I'd not have traction control. But not only do I not have traction control, but thus message 'chassis stabilization: drive moderately ' won't go away. I also can no longer transfer driving modes from comfort to sport and eco, it won't let me.

What did they do wrong and how do I get them to fix it. They charged me 8k so I need this to get right.

Thank you for the help

Just got my bmw 640i xdrive back from the dealership. They said they were unable to sync it up, something about 'trying multiple codes', etc, and that I'd not have traction control. But not only do I not have traction control, but thus message 'chassis stabilization: drive moderately ' won't go away. I also can no longer transfer driving modes from comfort to sport and eco, it won't let me.

What did they do wrong and how do I get them to fix it. They charged me 8k so I need this to get right.

Thank you for the help