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How to write a Letter of complaint-Electric power supply company

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Task. B1 level.

Write about 180-200 words. At the end of this post, you will find information about how to write a letter and its structure.

You have had an unpleasant situation with your electric power supply company and you have decided to send them a letter of complaint explaining;

  • The unpleasant situation.
  • Why you are not satisfied with the company.
  • Say what action the company should take.

And this could well be an example…

Dear Sir or Madam,

I am writing to express my strong dissatisfaction at the disgraceful treatment I received at your company.

Firstly, your company cut off the power supply without notification. To make matters worse, it made it at the end of the day, when I did not have any possibility to solve it.

According to your company, I had forgotten to pay the bill, but nothing could be further from the truth, the next day, when I tried to pay it, surprisingly, the bill was paid.

As you can imagine, I am extremely upset and I feel I am entitled to receive a written apology from your company, or else, I shall be force to take further actions.

I expect to hear from you as soon as possible.

Yours faithfully,


Structure of a letter.

As you probably know, there are several kinds of letters such as:

  • Letters of complaint.
  • Letters of request.
  • Letters asking for, giving, refusing or accepting information, an advice or an invitation.
  • Letters expressing congratulations, thanks or regret.
  • Letters of apology.
  • Letters of application for a job.
  • Letters to the editor or authorities, giving your opinion or suggestions.

The style of the letter depends on who it is addressed to. It is not the same to write a letter asking a university for information as it is to write an email to a friend. The passive voice can be used in formal letters, as well as complex sentences, no abbreviated forms, non-colloquial English and so on. Whilst informal letters can include, idioms, colloquial English, abbreviated forms, etc.

Be that as it may, a successful letter consists of:

  • A suitable greeting, depending on the style: Dear Mr Smith, Dear Anne, Dear Sir or Madam…
  • An introductory paragraph, where the reason for writing should be clearly exposed using expressions such as, I am writing to express my strong, I am writing in response to, I am writing to request, I was terribly sorry to receive…
  • A main body, explaining the subject into separated paragraphs using, firstly, according to, as you can imagine, as we all know, for all that, not only, but also…
  • A conclusion, in which you sum up the subject or express what you expect from them using, I expect to hear from you, I hope that this matter can be, without adding I would appreciate…
  • An ending, depending on the style and the greeting. If you have begun a formal letter with “Dear Sir or Madam” as a greeting, you have to end with ”Yours faithfully” or alternatively, you decided to begin with “Dear Mr Smith”, you have to end with “Yours sincerely”. But there are others formal and informal endings such as: best wishes, with love, sincerely, regards, yours…

Here, you will find more examples of letters or click on Tag Cloud, in the sidebar menu.