Explain what you bought, and when and where you bought it

You have just bought a new MP3 player from an online shop called CheapMP3.com. Unfortunately, the MP3 player doesn't work properly. Write a formal letter of complaint.

·        Explain what you bought, and when and where you bought it.

·        Say why you are sending it back.

·        Explain the problem and give details.

Giúp mik với mn ơiiiii! Mik đang cần gấp á:)))