From that email text, it seems clear to me that it is the information desk in terminal 3 landside.
But I'll ask them anyway to make sure.
I can't upload pictures but you can't miss it. Look to the left after you exit the luggage/custom.

I found a map that shows the landside area of terminal 3:
http://www.danishsquash.dk/djo/trans...irport_Map.pdf

Airside is dark grey and landside light grey.
You come out of the green area 'Arrivals' and the information desk is the 'i' to the left.