just to add ive got no experiance of freesat boxes.
but skys uses satellites at 28degrees East the same as freesat..
ive not got sky or freesat, but a free to air sat box that recieves 28E and gets me all the freesat channels + 100s of other crappy channels free on that satellite
Do argos do freesat?
If so buy a box from there, try it and you've got, 14 day no worries take it back job