Movie, Sports, Documentary channels not working and all are showing a key icon?

Hi folks.

Firstly apologies if my issue has already been raised, I just could not find anything related in this forum. I am a newbie.

I recently took delivery of a brand new TM800 HD. I even had a demonstration of it working on the most popular sports, movie channels. However, a week later, back at home, I connected it up and now I am not able to view all movie, sports, cartoon, documentary, lifestyle channels and many more. I noticed that all these channels display the key icon in the bottom right hand corner. I guess this mean these channels are locked?

I am however able to view terrestrial channels, and nearly all news channels.

I also see an intermittent message on screen - Service not found! (SID not found in PAT). Not sure whether this message is related to the described problem?

As I am a total newbie, can someone advise (in laymans terms) on what the problem may be and any remedial steps I can perform please?

Any help would be greatly appreciated.

Thanks in advance.

TheCaller