Curry's are shite anyway - owned by the Dixon Store Group. Get one of their service agreements at your peril!
Actually you know what you can do? Apparently the sales people get commission on the service agreements which is why the do the mega hard sell to get you to sign up for one. So you can use it as a bargaining chip to get money off the product you are buying.
Thing is they have to have a 14 day opt out clause when you buy the service agreement... so once you have your new tv/washing machine etc., delivered, simply ring up and canel the service agreement and you can get your money back!