That is a difficult question ,you paid for a new clutch which they did..Qestion is ,did they damage the drive shaft, was the failure something they should have noticed..is it a coincidence ??? In the long run you have to be able to prove it,and that is he difficult part...There is nothing wrong in approaching them about the issue ,but you will more than likely be fobbed off ..Being in the trade you can get coincidences such as what you have..But as I said earlier it's being able to prove the garage has caused the issue..Some mechanics will accidently damage an item and stay quiet hoping to get away wth it ..Also you may get the attitude of we where only paid to fit a cultch ,obviously common sense should dictate that they report any other faults / defects that they find whilst replacing the clutch ,Though they may say "was ok when it left here " Then again they may be ok about it ..Hope some of what I said helps