They should do
www.b3ta.com/talk/2369421

Basically if it's not fit for purpose (i.e. there's something wrong with it that isn't your fault), they have to give you a refund

Yay! Good deed for day done already and it's not even 1:30
( Mrs Trouser is probably annoying Dave just by being here on, Sun 7 Jan 2007, 13:25, archived)

Generally
you just mention the Sale of Goods Act and they open the till.
( sprinkles ITS AN ISLAND, morron, Sun 7 Jan 2007, 13:27, archived)