Sid, when you get the car back, try this.
Have the engine idling, have the shifter in the neutral gate,
press the clutch all the way down, and then slowly try to go
into reverse or 1st gear. If it grinds or won't go in, my experience has been that you need to lengthen the clutch adjustment rod, as it is not traveling far enough to fully release the disc. If your pedal goes down some before you feel pressure, this will confirm this condition. This is an easy test to either confirm or eliminate a condition. Hope it helps.