Help - after cluster replacement, clock on stereo doesn't work!

[AudiBMWSX45]

I had my center instrument cluster replaced at the dealer today under the goodwill program.

The downside is that the dealer screwed up the clock on the Business radio display, and I can't get the time back. There are just dashes showing, and no matter how many times I've tried pushing the clock button and other combinations of buttons, I can't set the time or get a time to display. I've read the manual and nothing works.

Does anyone have any ideas?

Thanks.