ServerPronto: The Hotel California of Server Hosting?

I don’t need my ServerPronto account anymore, because I use SliceHost’s flexible and easy-to-use solution. So time to close my ServerPronto account and save myself $30 or so per month…except…

…it seems to be very difficult to close a ServerPronto account! I’ve tried. I’ve jumped through the hoops they set. More than a month has passed since I completed the process but my account is still merrily open…

A little bit of googling reveals that many people have trouble closing their ServerPronto account.

Any tips on what I can do from Germany, to force a Florida, USA based company to get their act together and close my account?