急求英语投诉信王华在第一百货商店买一部SQ200的手机,使用不久后就不能发短信和照相了,希望第一百货商店可以换一部新手机

Dear manaager,
(第1段)The goods I ordered from your department should have the functions of taking photos and sending messages.But the SQ200 didn't work.
(第2段)Needless to say,the lack of functions has put me to great inconvenience.It is,therefore,imperative that dispatch the SQ200 cell phone immediately.Otherwise,I shall be obliged to cannel the order or change the goods with other ones.
(第3段)Please looking to this letter as one of agency and let me have your department's reply as soon as possible.
Yours,Wang Hua