Clutch and idling issues

Hi there.

I have recently had a new clutch put on my car. For a while, it worked excellently. I did not have to push my foot through the foot-well to change gear. Recently however, I am finding it harder and harder to change gear, especially during a long journey. I have found that if I put my foot under the pedal and pull it up, it makes it slightly easier to change gear, but it is still very difficult.

Also, if I go for a journey (does not matter how long), my car sometimes wont start. It will struggle for ages, then revs up to 2000/3000 revs, then it drops off, idles roughly and then it dies.

Any ideas about how to fix these problems?