k12 radio code help

radio code needed for nissan k12 s/n bp334947303398 part number 7643349318 i have a radio code of 0709 but this dosnt work if someone could check pls be much appricated i have a recipt for the radio code that was in the car but unsure if its for the current radio in the car which is a factory one, all im getting is waiting 1 hr enter code press up arrow then just returns to wait one hour
 
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