
Here is a solid gold rant from a friend of mine on such an issue with Virgin Media regarding internet bandwidth that, owing to its ferocity looks like it might actually achieve something as long as he "promises to not use offensive language in future". This might be the future model for us consumers in the modern age of de rigeur bureaucratic resistance.
Also of great interest is the fact that his very angry email was sparked by the fact that Virgin Media apparently place close attention to comments made about them on Twitter. The Virgin staff watching Twitter contacted him after noticing angry tweets condemning their service.
After being invited to phone a particular member of staff directly to deal with his issue, he was further reprimanded for "offensive language" for referring to the staff he had previously dealt with as "lackeys", leading to him writing in his conclusion that:

If that resonates with any of you, I highly recommend you read the entire rant, complete with the angry email he sent where he blew his top.