【正确答案】[范文] December 18
Dear Sirs,
I'm writing to you to complain about the air-conditioner I bought in your supermarket yesterday.
Unfortunately it doesn't work properly. I'm really disappointed at the poor quality of your products. So I hope you can take immediate actions to deal with this problem.
If the air-conditioner cannot be fixed well, I demand a full refund.
Sincerely yours,
Li Ming