The repair guy said, "Bring it in," but apparently he was referring to the copy of the insurer's estimate, not my car.
When he saw I was about to burst into tears from frustration (the car, exhaustion, fear that "he" will never call again, hatred of work, etc.), he looked up the rental agency's number for me so I could call to reschedule. I got to work 20 minutes early, and that included stopping for a consolatory coffee. One more week of nearly being rear-ended to go.