Hows about this one?
I cancelled my 'Virgin' service in February 2007. They cut telephone, broadband and TV in April, but I kept getting a bill from them for a following 7 months...each with its own broadband, telephone and TV. The TV one had 14-16 PPV movies added on each month, so by the 7 months up, we owed £1200 (according to them).
Needless to say, I just ignored all the letters and allowed them to take me to court...where I produced my cutoff confirmation papers.
Egg on their faces. Oh yes, indeed.