【正确答案】
Dear Sir/Madam,
I am sorry to tell you that there should be cause to complain about the * * walkman I have bought from your shop recently. Your sales assistant told me that I needn't question about its quality because * * is a famous international brand. After I came back to school and tried to enjoy my favorite music by using the looking-good walkman, I couldn't hear anything through its earphones. I borrowed earphones from my classmate and this time I heard the sound very clearly. So I think there must be something wrong with the earphones. This is rather annoying to me.
As a student, I must improve my English as quickly as possible. That's the main reason why I bought the walkman. But unable to use it, now I cannot study according to the schedule.
What you choose to do with this piece of information is entirely up to you.
I am looking forward to your early reply. Otherwise, I would ask you to give me a refund, or I would complain to the Consumers' Association.