clutch peddle

Hi i have a Renault megane 1.5dci estate ive recently had a new clutch, but then the peddle return spring broke i have a new spring but im sure its not the correct one so i haven't got it fixed yet, but now every now and then the gears stick..ie it has trouble oing in to 3rd gear from 2nd gear.

1.Does anyone know where to buy the

correct spring.

2. Any help with the peddle please

Thank you

Debsx