You want revenge? Then move on. Just walk away and wash your hands of this guy. Forget his phone number; don't take his calls. Clearly, he's getting SOMETHING out of keeping you on a string, so cut the string and walk away. Seriously, removing yourself as his backup is excellent revenge.
Began 14 August 2008
Initial goal of 175 reached 5 July 2010
Goal reset to 160
Maintaining 160-165 since November 2010