Samsung Srl629EV fridge freezer?

I have the American style, but one wide door instead of 2 narrow doors, fridge freezer. The door alarm plays Yankee Doodle if it isn't shut. Since midnight last night it has been playing constantly every minute even though the door is shut firmly. Also the temperature of the fridge shows as 9C (freezer is fine). The light in the fridge either stays on or goes off, neither is linked to the door being shut.I suspect its the display rather than the fridge itself. Any ideas how I can switch of the music? It's driving me mad!