Beoworld neither can nor will provide a pin code, and neither can anybody else, sorry to say.
It’s part of Bang & Olufsens anti-theft programme.
Best is to bring the original purchase receipt with you to the nearest dealer, but
as a minimum bring the unit in with the serial number intact and visible, so they
can check against B&Os stolen goods registry.
If everything is fine it won’t take long for them to reset the unit.
If it’s stolen, it’s worthless.
Martin