I've got exactly the same problems as the first two posters after a £600 order of various bits of stuff.
I ordered on the 1st of Jan with an expected dispatch date of the 4th. No sign of the package on the 5th and no communications from Scan to say there was a problem.
Guess I'll be calling them tomorrow morning to see what the holdup is and why they haven't been in touch like they're supposed to if the order is delayed. While I appreciate that they were probably flooded with orders all needing attention after Christmas I figured that was the reason I was waiting 4 days rather than the usual two.