Try suing them in a small claims court - it's worked at least once before:

In the end, printed on a baby blue sheet of paper by the clerk's aging dot matrix printer, the judgment was actually entered for $761.00 total, due to the $40.00 court costs. I couldn't help but to smile in front of the judge.

"But it's not fair!" Google's paralegal protested. "What if everyone whose account was canceled sued Google?"

http://www.huffingtonpost.com/aaron-greenspan/why-i-sued-goo...

(IANAL, etc)