Have you tried turning it off and back on again???
Seriously though, have you tried resetting it?
IIRC, hold down; <, > & "musical note" (I think it is the note, I have an "i" on mine).
The unit should go off then come back on after 10-20 seconds.
I don't think it will solve it but it might. I doubt it will make it any worse. At the end of the day it is just a computer in the dash and computers do crash!
Good luck with it.
P.S. If it was my 5 week old head unit, I would have parked my car across the entrance to the workshop and refused to move it until it was either a). FIXED or b). REPLACED.
And a side note: Have they coded it in properly? I would be tempted to get them to check!