As consumers, we have the right to voice our dissatisfaction when we encounter unsatisfactory products or services. One way to do so is by writing a complaint letter.

When writing a complaint letter, it is important to keep in mind the tone and language used. It is best to use polite and professional language, while clearly expressing the issue at hand. Explain the situation in detail, providing specific examples and evidence to support your claim.

Here are some useful phrases and sentences that can be used in a complaint letter:

· I am writing to express my dissatisfaction with…

· I was extremely disappointed to find that…

· I feel that the quality of the product/service is not up to standard…

· I believe the issue lies with…

· I would like to request a refund/replacement/compensation…

· I hope that you can rectify this issue and prevent it from happening again in the future.

It is important to be specific and concise in a complaint letter, while still providing enough information to help the recipient understand the issue. It is also important to remain calm and rational, as this will increase the chances of a positive response.

When ending the letter, it is important to thank the recipient for their time and attention. This shows that you are respectful and appreciative of their efforts.

Here are some useful closing sentences:

· Thank you for your attention to this matter.

· I look forward to hearing from you soon.

· I appreciate your prompt attention to this issue.

· Thank you for your understanding and assistance.

Overall, writing a complaint letter is an effective way to express dissatisfaction and seek resolution. By using polite and professional language, providing specific examples, and expressing a desire for resolution, the chances of a positive outcome are increased.