My order has not arrived, where is it?

Originally asked by Thomas on Jan 28, 2010 and asked 2106 times since.

Royal Mail will consider a UK package lost after 15 working days have passed from the day it was shipped to you. International packages will be considered lost after 25 working days have passed so please wait until this time has elapsed before contacting help@planet-mu.com making sure to quote your order reference number.