Dear Sir/Madam,
I am writing to express my dissatisfaction with a recent purchase from your store. I bought a new laptop from your store on [date], and I am extremely disappointed with the quality of the product.
Firstly, the laptop is very slow and slow-加载速度. I have been using it for [length of time] and I have yet to see a significant improvement in its performance. Secondly, the keyboard is faulty and several of the keys do not work properly. This has caused me a great deal of inconvenience as I am unable to type properly.
Additionally, the battery life of the laptop is much shorter than advertised. I have been using it for [length of time] and I am only able to get [length of time] of battery life left. This is very frustrating as I need to be able to use the laptop for long periods of time.
I would like to request a full refund for the laptop, as I am not satisfied with the quality of the product and its performance. I have attached my receipt to this letter as proof of purchase.
I look forward to hearing from you and resolving this issue as soon as possible.
Sincerely,
[Your Name]