C5 after Kuppliúngs exchange strikes the donor cylinder/pedal falls through

When this was finished, I saw the clutch pedal fall through at the entrance (back) I pulled it up again with the tip of the foot, it stayed there. Then I drove home from the workshop; everything OK! The next day, when I wanted to drive away, I pressed the clutch and put the gear in, when I let go of the clutch, the car jerked on and blocked the engine. The pedal remained also below. After phone call with workshop and tip something to pump on the pedal, would probably be Lu ft in the line, I did this , can switch again , immediately to the workshop udndort was found that there was no air in the system . I explained once again the process and the master came to the conclusion , then the clutch sensor and/or clutch encoder must be no longer in order . An exchange must be here . Now cost approx. 320 ,-Euro 3 hours work . Because I have adjusted to this clutch history , I can drive with my car , it goes . However , “Kuplungs Kom plett renewal” not also clutch encoder and taker ? Would the WerKstatt not have had to recognize this defect too ?? Who has made similar experience ?