Renault clio radio problem?

Hello all, my girlfriend has recently bought a used car and entered the incorrect radio code three times therefore the radio has now locked ( it goes off on the wait screen on 38 seconds ). The radio code in the manual was wrong when she bought the car. How would she fix this or where could she take it? So we need to unlock the radio first of all and then we need the radio code to enter once it is unlocked?