Dear Sir or Madam,

I am writing to complain about your hotel service. My parents and I had a terrible stay in Room 512.

Firstly, the air-conditioner wouldn’t work. When I asked the staff for help, they said ok. But eventually no one came. Secondly, I found the bathroom rather dirty to bathe in. What was worse, the noise outside at night was so loud we found it hard to fall asleep. I asked to change rooms, but was refused for the reason that the hotel was full. It was surprising that the waiters treated us in a very casual and indifferent manner.

I would like you to refund my money. Unless I get a satisfactory reply, I’ll write to the Consumer Association.

Looking forward to hearing from you.

Yours faithfully,

题目分析：这是一篇提纲类作文。假设你是李华，最近跟父母去国外旅行时所居住的旅馆服务不好。请根据以下要点提示：给旅馆老板写一封英文投诉信， l空调无法关掉； 2浴室不干净；3．晚上周围噪音很大，且不给更换房间。4服务员态度随意，漫不经心。需要写的内容已经粗略给出，需要我们翻译成完整通顺的句子，适当添加些内容，使文章更充实。写作时注意准确运用时态，上下文意思连贯，符合逻辑关系，不能出现文章脱节问题。一定要给出自己的看法。尽量使用自己熟悉的单词句式，同时也要注意使用高级词汇和高级句型为文章润色。注意要求的词数100词左右，不要太多也不要太少。

【亮点说明】It was surprising that the waiters treated us in a very casual and indifferent manner. 这里含有一个主语从句。