Simple fix mate, just swop out the clutch slave and fit a braided clutch line and flush out oem fluid and replace with something like Motul RBF 600.
This should fix your issue, but as you have had a horrendous time of it, you should perhaps swop out the master cyl as well.
Your clutch peddle issue is very common.
If you want me to have a quick look then I am only up the road in Perth.
Alex.