向 AWS 客服提交退款申请，说明你是新用户，在免费试用期结束后没有留意到 EC2 仍在运行，导致了意外扣费，并请求 AWS 免除费用并退款。以下是具体操作步骤和申诉信模板：

申请退款的操作步骤

1. 登录 AWS 控制台

   • 访问 AWS Billing Dashboard。
   • 确保你的账号已登录。

2. 提交支持工单

   • 在 AWS 控制台顶部，点击 “Support” > “Support Center”。
   • 选择 “Create Case”（创建工单）。
   • 在 “Regarding”（关于）部分，选择 “Account and billing”。
   • 在 “Service”（服务）部分，选择 “Billing”。
   • 选择 “Payment issue”（支付问题）。

3. 填写退款申请

   • 在 “Case description”（工单描述）中，填写以下信息：
     • 说明你是新用户，不小心忘记了 EC2 仍在运行，导致了非预期的费用。
     • 你已经终止了 EC2 实例，并希望 AWS 免除费用并退款。
     • 提供你的账号 ID 和实例 ID，列出具体的账单信息。

4. 提交申请

   • 选择 联系方式（建议选择 Email 或 Live Chat）。
   • 提交工单后，AWS 支持团队通常会在 24-48 小时内回复。

Dear AWS Support Team,

I hope you are doing well. I recently noticed unexpected charges on my AWS account (Account ID: XXXXXX) due to an EC2 instance (Instance ID: i-0dc8XXXXXX) that I unintentionally left running after my free tier expired. As a new AWS user, I was unaware that the instance continued to accrue charges after the free trial period.

Upon realizing this, I immediately terminated the instance to prevent further charges. However, I have already been billed for the following months:

December 2024: $XXX (Issued on 01/02/2025)
January 2025: $XXX (Issued on 02/02/2025)
February 2025 (Estimated): $XXX
I kindly request a refund for the charges incurred after my free tier expired, as I did not intend to use the service beyond the free trial period. I would greatly appreciate any assistance you can provide regarding this matter.

Thank you for your time and support. I look forward to your response.

Best regards,