God N1A, that sounds terrible. If I were you I'd do ask around and look for another nursery - they fail on numerous points but what happens if they make another error of judgement and refuse to take respoinsibility?
and if your son hasn't really settled then another move sooner rather than later will be for the best.
I'm trying to settle my son (same age) into a Montessori nursey where all of his toddler group friends are but it's taking some time. The nursery told me to come with him for an hour everyday so he gets used to it as a play environment and they are letting me do it for as long as he needs, free of charge. Luckily I don't have a full time job yet too so I can do this. He is still not happy with me out of sight though. They have talked about 'biting the bullit' and just even going to the shops and letting them soothe him but I'm not sure if I'll be more upset than him!
I'm going to post on here about tips for easing him in.
How are things going with the bus Pruni?