Mama, what's a wanker?
Below are the final paragraphs of a delicious two page complaint letter. Many will save it for use in the future because I doubt that any of us can supply a letter that expresses precisely, what we all feel when shafted by a company. This guy has hit it all.....

How surprised I therefore was, when I discovered to my considerable dissatisfaction and disappointment what a useless shower of bastards you truly are. You are sputum-filled pieces of distended rectum - incompetents of the highest order. British Telecom - wankers though they are - shine like brilliant beacons of success, in the filthy puss-filled mire of your seemingly limitless inadequacy.

Suffice to say that I have now given up on my futile and foolhardy quest to receive any kind of service from you. I suggest that you do likewise, and cease any potential future attempts to extort payment from me for the services which you have so pointedly and catastrophically failed to deliver - any such activity will be greeted initially with hilarity and disbelief - although these feelings will quickly be replaced by derision, and even perhaps a small measure of bemused rage.

I enclose two small deposits, selected with great care from my cats litter tray, as an expression of my utter and complete contempt for both you, and your pointless company. I sincerely hope that they have not become desiccated during transit - they were satisfyingly moist at the time of posting, and I would feel considerable disappointment if you did not experience both their rich aroma and delicate texture. Consider them the very embodiment of my feelings towards NTL, and it’s worthless employees.

Have a nice day - may it be the last in you miserable short life, you irritatingly incompetent and infuriatingly unhelpful bunch of twats,

Accidentally found at this site to which I was directed by somebody I can't remember