Quite correct mate.

If the garage had supplied and fitted the parts it would have been up to them to sort it and recoup the costs but not in this case.

Are you sure its bled properly ??

Wee trick to try is to keep the clutch pedal held down overnight with a stick or something similar, remove the top from the master cylinder as well.

Used to have to do this with old Land Rover brakes that were a bugger to get bled correctly, dont ask me how its works as the first time i was told to try it i was a tad sceptical but it worked so worth giving it a go.