If you have trouble closing your account go to http://ibill.com
and they will do it for you the phone number is on the contact page. That way you have nothing to do with true host and ibill has more power over truehost on who gets charged. This only works if ibill appears on your credit card statement.
You guys say that colucus is going to shut down the servers. What stops truehost form moving servers to a different host? And you say that iBill is going to shut them down. What stops them from starting a new companies or finding a new cc processor for their billing?