Watching Czech telly in England

I wonder if anybody could help. I just had a sattellite dish put in today. Bought a digibox in Prague with the card in and yet only get about 6 chanells. The bloke told me I can watch 15 chanels for free. Looking at my profile there is no option, but to pay for the CT1, Ct2 etc.. basic chanels which were mean to be free. Is it possible that they sold me an old card? I am a Czech woman who doesn`t understand thechnical stuff, but surelly I must do something to get the main chanals for free. Any help will be greatly appriciated.
Irena