Dear Sir/Madam,

I am writing to express my disappointment with the recent stay at your hotel. Unfortunately, my experience was far from satisfactory. Firstly, the room was not clean and had a musty smell. Secondly, the air conditioning was not working properly, making the room uncomfortably hot. Thirdly, the noise level from the adjacent room was unbearable, making it difficult to sleep.

I brought these issues to the attention of the front desk staff, but they were unable to resolve them. I believe that as a paying customer, I deserve better service and a comfortable stay.

I hope that you will take my feedback seriously and take the necessary steps to improve the quality of your hotel. I look forward to hearing from you soon.

Sincerely,

[Your Name]