If you have a bitch with authorities or with a company, over bills, costs, or just about the service you're receiving from whoever offends, write them a letter. Get straight to the point, highlight offending details, and then, and this is the important part.... add some well chosen c.c's.
When customer services receive a complaint they'll generally have their own way of dealing with it, and often a stock acknowledgement letter will come out to you, and your letter will be filed somewhere to be dealt with, or not, at a later stage. Organisations, and individuals, don't like to accept responsibility for a problem, and it can take a while to find someone who'll actually do anything on your behalf.
Just by adding the c.c. at the end of your letter will ensure that some action is taken. I'll cite an example: I recently wrote to my 13 y.o. daughters bank when a £40 transfer to her account had failed to be credited to her, and numerous visits to said bank only asked her to check with the source bank. They then wrote to her to ask her to sign a mandate authorising them to remove £40 from her account so that it could be returned to the originating bank.....enough detail.... the letter was written detailing all communications.. it asked for the immediate crediting of £40, a written apology, and a shake up in their staff training, this referred to a threat to refer a 13 y.o. to debt collectors if she failed to permit the removal of funds from her account.
cc CEO of said banking group (this was the only copy actually sent)
cc BBC watchdog
cc The Sun Newspaper
48 hours later she had her apology in writing, her £40, and a £50 compensation payment for distress caused.
So don't be shy folks, if your having problems write that letter.