Could be just a fuse, if not, you need to take a trip in it, to the nearest scrap yard. With the money you receive for it, buy another car, as it will cost you a fortune getting it fixed. Type "Renault" into the search box and you will see how many electrical problems others have had with their cars.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.