I am writing this letter to express my dissatisfaction about a helicopter model I bought from your website a week age.
You need to give some reference that can help those guys to trace your order. You need to do this in the first line or two itself. Quote your purchase reference, date and the model you purchased.
I'm copying the following notes which I found in another website thinking that it would be useful for you for this task;
IELTS Letter Writing Tips -
10 Ways to Get Higher Marks on the IELTS Letter Writing Task
1. Identify the type of letter you are being asked to write. Is it a formal, semi-formal or informal letter? The entire tone of your letter is based on your answer to this question. Adjust your style and choice of words according to the type of letter you have been asked to write.
2. Open and close the letter correctly.Remember that each type of letter requires a different opening and closing. The chart below will help you remember this:
Style Characteristics Opening Ending
Formal To someone you have not met, whose name you don't know Dear Sir / Madam Yours faithfully
formal To someone you may or may not have met, whose last name you know & use Dear Mr Brown,
Dear Ms Stone Yours sincerely
Informal To someone you know well, whose first name you know and use Dear John
Dear Anita Best regards
3. Open a formal and semi-formal letter with a formal sentence. Don't try to be friendly, as you do not know the person you are writing to. Get right down to business and indicate the reason you are writing, as shown below:
Dear Sir / Madam,
I am writing to inquire about / I am writing in connection with...
Dear Mr Jones,
I am writing to inform you ... / I am writing in connection with...
4. Open an informal letter with a general, friendly paragraph. With friends whom we know, we care about the whole person. We have a broader relationship in the context of which this communication is taking place. So it is best to acknowledge that friendship first, before getting down to the reason for your letter. In fact, the first paragraph could be purely friendly small talk, unrelated to the reason for your writing. Look at the example below:
I hope you and your family are all well. It was such a pleasure to see you again last summer. We sure had a great time catching up with each other after so many years. You have always been a cherished friend, no matter how much of a gap there has been since we met.
Anyway, the reason I'm writing is that I have some good news - I am getting married this summer...
5. Identify the main purpose of the letter. Are you asking for help, apologizing, inviting someone, complaining or thanking someone? Learn appropriate and polite expressions that will support what you need to say.