could you please help me with this? thank you very much!

0I am prepairing for the IELTS test. I would be very grateful if you could correct the errors of my writing example.02br
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00The IELTS writing section consists of two tasks. In task1 candidate have to write a letter in response to the request. I post them below. Thank you02br
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01font00Task 102font02br
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01font00You recently went shopping at the local supermarket. When you got home and studied your bill you found that you had been charged for items you did not purchase.02font02br
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01font00Write a letter to the supermarket manager explaining what has happened. Tell the manager how you feel about the error and ask him to do something about it.02font02br
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00My 00writing example:02br
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00Dear Sir or Madam,02br
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00I am writing to explain my unhappy shopping experience in your market. I was charged for a box of soap which I had not bought. I would be grateful if you could return the money which was overcharged.02br
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00Yesterday evening, I bought a few items at your branch supermarket in Huilongguan. Because of a long queue behind me, I just paid the amount the shop assistant asked for without a close look at the bill. When I return home, I found that a box of Lux soap, which I did not purchase, was in the bill in black and white. The box of soap costs 50 Yuan. 02br
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00I am sure that you will agree that it is very uncomfortable for a customer being overcharged. Until now, I still cannot find what led to this error. I appreciate your prompt response to this matter and return the money as soon as possible.02br
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00Yours sincerely02br
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00Bill Wilkins0-