Can’t select any gears !!! Help

Hi everyone! I’m new on here :smile:

I’ve had my Clio rs197 for about a month and I’ve had nothing but problems. It had a fresh mot on it with no advisories but I’m having issues with my gears. If I drive down a motorway, I would get to a roundabout and have no pressure in the clutch and would have to pump it loads to build pressure up.
I’ve bled the clutch about 4 times, which would help for a couple days, I’ve replaced the master cylinder on it and now I can’t select any gears or even get pressure to the clutch!!!
I think might be the slave cylinder but has anyone got any ideas??