This thread though.
I'm dying to know WHY child was booted, effective immediately. I did it to a daycare child who decided to pick up a (toy, but 'actual tool') shovel and smash a glass window, causing it to need replacing. My contract states that I CAN and WILL terminate at will for violent/aggressive and/or destructive behavior without refund. I was brought to small claims court and not only won the judgement, but won my counter claim for court costs, lost work, and defamation.
If your child's behavior was so severe that it warranted immediate expulsion, you need to evaluate your child. In addition, pursuing this over a year later makes you seem just vindictive and angry.
There are things to carry a torch over in regards to your child, this is not one of them.