I've had clutch replaced on an old Suzuki Wagon R+ to a new aftermarket one. While it fixed the problems of changing gears I had, however, the clutch pedal is very stiff now. When pressing about halfway down - there's a lot of resistance. When releasing - it wants to jump back halfway up, which makes it very hard to catch the biting point and there's a high chance of stalling if you relax your foot. Problem exists even when the engine is not running.
Did the service do something wrong when installing the clutch? What could potentially be the cause of the problem?