Sounds rather harsh. Personally I find being nice but insistant works well, also using as much techinical jargon as possible so that you are passed to somebody who understands what you are talking about. Also paraphrasing back what they are saying "So you are telling me ....." especially when it is a bit rediculous what they are saying.

In reply to a post by Tox_Laximus:

Anyone with pride wouldn't do a job like that, so your not going to upset anyone deent.

A job is a job.

Thoughts..

Ok so #1 try to avoid calling a call centre in the first place - use twitter/facebook/forums etc/email if possible
#1.5 look for options say in saynoto0870.com to direct to a different call centre in UK if poss (some offshore ones are ok, depends on issue too)
#2 be insistent but polite, ask to escalate and keep asking
#3 contact CEO office

I've done some combo of the above with three, vodafone, bt,carphone warehouse and each time things have been resolved properly and it hasn't taken too long. (replacement phones/models/bad billing etc)

Keep notes, names, times. Use multiple communication paths to push and pull the issue.