what do i do about my faulty spectra kettle?

i purchased a spectra kettle from Argos in Bletchley, Milton Keynes in April 2008 but i have lost my receipt. the lights on the kettle still work but it will not boil. i love my kettle and i saved for 3 months to buy it as i am on benefits and £40 is alot of money to me. i am gutted and as my kettle is less than a year old i would really appreciate a replacement. you can contact me at footloosebacon@rocketmail.com or phone me on 07535303846. thankyou. xxx