Take it back to Currys for a full refund. Don't take anything else from them but your money back as the box is clearly not 'Fit For Purpose'.
Additionally during the first six months of lifw is is up to the retailer to prove that is isn't faulty not the customer to prove that it is.
Matsui, despite its exotic Eastern-sounding name is actually a DSG Own Brand and so you must have bought it from them.
T
November 2008