Hello, my name is Mark and I will try help you with this.
If these faults were not present before the clutch was replaced then there are only a few possibilities.
1. The system requires to be bled.
2. The clutch was fitted incorrectly.
3. The slave cylinder is faulty.
4. The clutch assembly is faulty.
5. The gear linkage adjustment is incorrect.
Do you still require help with this?