Personally Dave, I'd boycott Watford Electronics/Savastore altogether, rather than try to deal with them by phone. They have (some) cheap prices, but the honesty of their delivery time and stock availability quotes is... questionable to say the least! And they just never answer those 0871 numbers, once they've got you listening to the music.
Luckily I can benefit from their prices without having to endure too much poor service. I live nearby - I can collect in person, and I can go in and create a scene if there is a problem with the goods. And if they try to fob me off with an imported reconditioned item with instructions in an obscure language, instead of a new UK model, I can refuse to accept it.
Have a look at
http://www.grumbletext.co.uk/vt.php?t=430&subj=complaints+Watford+Electronics+co... if you need any more convincing.
In fact, come to think of it, their staff would all be good candidates for future vacancies at OFCOM - a body which shows similar levels of respect for the citizen consumer...