给商场经理写一封70-90词的投诉信

Dear Mr. Gao,I am writing to complain about the work you have doneto my colour TV,which I bought from your shop.I bought the colour TV from your shop last week. Butwhen I came home andturned it on, I found there was no picture at all. I triedand tried for along time, however, there‘s still no picture. So I visitedyourshop again, telling them about the problem. But theysaid it must be myfault. I am very dissatisfied with your service.I hope you will replace the TV with a new one or refundme as soon aspossible.Yours sincerely,(your name)