【正确答案】Dear Mr. Robert,
[1]On Oct. 21st, I purchased a Vacuum Cleaner from your supermarket.
Unfortunately, it completely failed my expectation.
[2]Disappointingly, the vacuum cleaner doesn't work efficiently to pick up dust. To
make it worse, when I went back to your store, I was told that because the cleaner was on sale, I could not exchange or return it, which I was not informed when the purchase was conducted. [3]
I request that you provide me with a prompt solution, on the condition that once the cleaner proves to be of poor quality, I can change for a new one or I will get a refund.
[4]
I can be reached during the day at (806)3273551. Hope to hear from you soon.
Yours sincerely,
Li Ming