英语作文：要求：what went wrong with the product?what false claims did the advertisement make?

Excuse me.I would like to return this MP3,because I am not satisfied with its functionalities,which does not accord with the introduction of the advertisement.
First of all,the item is said to be able to keep playing for about thirty hours,which is,however,a falsity.In fact,it could not continue working for even ten hours.I am sure that I do everything according to the specification,and electricize it for as long as it asked.There must be something wrong with this item,or with your advertisement.
In addition,there is also some problems with the recording part.I do not mean that it could not do the record.I did make a piece of dialog,but the sound was so noisy that nobody could know what it was saying.How could that happened?
Further more,the item should be able to show the lyric when the song is played,which is claimed on the ad,but it cannot.When I tried it before buying,you played an English song,and the lyric is all right.However,when I played a Chinese song,Oh my god!It showed me some strange symbols,It’s even not a word!Could it only play English song?I did not hear that.
Lastly,the radio function is also not so good.The voice is not clear enough for me to understand the words.
Anyway,there are too many wrong with this MP3.I don’t want to keep it.It not so good as that the advertisement claims.I want to exchange for a good one,or return it and take back my money.