A search round the web indicates a parent company called ANU Club, see here
http://www.anucorporate.co.uk/
These type of companies offer "points" based holidays, where you buy so many points off them, which entitles you to a holiday each year.
When timeshares became illegal they were replaced by points based holidays, but they are run by the same sort of con artists who used to run time shares.
Often they get you to sign up by offering you so many points, but whe you try and book a holiday you find out you need to buy more points to get a decent holiday (as you seem to have discovered).
That is the way they work, it is all an attrempt to get you to buy more points and pay them more money.
This UK based arm may be in financial trouble, hence the "phone not working" comment on their web site, sounds very dodgy to me.