On my way to the front lines I had fully determined to return the bogus piece of kit and take the loss (a false loss I might add, the guy told me I would have to pay a 10% repackaging fee). I went into the PC World trenches fully prepared for a bloody fight, but the soldier on duty turned out to be extremelyt helpful. He happily exchanged my dubious piece of kit for the right specs and all had to do was pay the difference in price between the two units. This turned out to be only £15. Give that soldier a medal!
I am now wireless. Ye ha!