您好：One possible version:
Dear Sir,
I'm writing to tell you about my experience in your bookstore. I bought an English dictionary there two
days ago. When I arrived home, I found that some pages of the dictionary were missing. I went back to the
store the next day and asked a saleswoman to change it for another one. However, she was very rude and
said it was my own fault. I was deeply hurt by her attitude.
I would like you to change my dictionary. I would also like to suggest that you improve your service to
the customers.
I'm looking forward to receiving your reply soon.
希望对您的学习有帮助
【满意请采纳】O(∩_∩)O谢谢
欢迎追问O(∩_∩)O~
祝学习进步