Congratulations, you own one of the most unreliable make of cars, as you have now found out to your cost, well, you will do when you get the bill for the repair from a main dealer. Window motor problems are common on these cars. If you had bothered to type Renault in the search box you would have seen lots of people with the same problem as yours. Renaults are in the bottom six of unreliable cars as reported to a well known consumer magazine by their owners.
DB
July 2011