“pedal up and the release bearing is no longer engaged and so won’t squeak”
pedal down and the release bearing is under maximum stress usually makes it quiet – unless its really far gone when it will growl.
Pedal up and its disengaged and is free to move and vibrate on the shaft + squeek IME and its a well documented issue in pugs.
When mines came out both it and the pressure plate were a mess.
i guess it depends if the garage has fitted it correctly. they certainly disturbed something for the noise to go away for a week. Did you see the old clutch or release bearing that they replaced?
It is worth getting them to check the clutch cable is set right – mines was a bit of a pain to get right so that it wasnt loading the clutch when pedal was fully up – but so that it was fully disengaging the clutch when pushed to the floor and not just flopping about at the full extension.