Volvo v50 1.6D coupling problems

Hello dear Talker, My v50 has problems with the clutch, clutch pedal stays now and then just down, I have to then make the car up the pedal and pump several times (if it comes back then) , now I had the car on 28.02.21 brought to the workshop, and I was told until yesterday he would not get any parts, on my question what would have been broken … the main cylinder. (Which is now the main cylinder?) I picked up the car yesterday statement I was able to drive with but has to pull the pedal back again and again, Very nice is of course super almost 4 weeks without a car with 2 children, for nothing. I called yesterday directly at volvo and asked how it looks like whether the parts have been in stock because I don’t want to miss out on the car again 4 weeks, and those who thought they would have to look which cylinder is broken and then it would take at most 4 hours… had someone already the same problem and can tell me which cylinder is meant by it ? Thank you and dear greetings