Citroen Relay clutch pedal with no pressure stuck to floor position, any help?

Testimonial: "Checked for any fluid leaks from the pedal, at the master cylinder, following pipe work down to the slave cylinder at the bottom off the engine / gearbox. This is located just behind the intercooler. Found that fluid had been forced out of the nipple which is part of the plastic slave cylinder body. Removed slave which is mounted with two 13mm head bolts. Removed clip that from inlet pipe and then sealed end of pipe to stop any fluid leaking. The piston for the slave appeared not to be a very smooth action when forced in and out by hand. Removed rubber boot that covers piston rod and found that the rod was pitted and a little rusty. Cleaned with a fine piece of wet and dry. Cleaned slave body with WD40 . Refitted to mounting and reconnected inlet pipe. Checked fluid level was topped up. Pressed clutch pedal 3 to 4 times then checked & topped up fluid level. Repeated this process several times until correct pressure was felt at the pedal. It is important to check the fluid level regularly. It would have been a little easier and faster if there was a second person to help. But it is possible to do the job or your own. Thanks for the advice was very helpful."