Task: Content Generation / Email
User instruction:
You are a customer of a company whose paid service has been suspended without notice for the past three days.  
You would like to politely request the following via email:  
- Clearly describe the duration and impact of the outage  
- Request an apology and explanation for the interruption  
- Ask for a refund or compensation for the unused period  
- Inquire about measures to prevent recurrence  

The email should be official and courteous, addressed to the Head of Customer Service, and should maintain a clear and firm tone without causing offense.  

Please draft the email.

Evaluation criteria:
The period and circumstances of the service interruption must be clearly stated.
The request items (the duration and impact of the service interruption, an apology and explanation for the outage, refunds and compensation, and future measures) must be specified in detail.
The recipient must be the Head of Customer Service Team.
The tone of the email must be formal, polite, and firm.