How Can I get Refund for ECS Substantial Code for Code Crashed Running tasks for days

To request a refund for unexpected ECS charges due to crashed tasks that continued running, you should contact AWS Billing Support directly. Here's how to proceed:

1. Open a case in the AWS Support Center by visiting the AWS Management Console and clicking on "Create Case"
2. Select "Account and Billing Support" as the category
3. Choose "Billing" as the issue type
4. In your support case, include:

• "SLA Credit Request" or "Billing Credit Request" in the subject line
• Details about the incident, including dates and times when the tasks were running unnecessarily
• The resource IDs of the affected ECS tasks
• AWS regions where the tasks were running
• Documentation or logs showing the code crash that led to the tasks continuing to run
• The specific amount you're requesting for refund ($2018 - your usual $500)

While AWS will review your request, there's no guarantee of a refund as this appears to be related to your application code crashing rather than an AWS service failure. However, AWS Support may consider your long-standing customer relationship and the fact that this is your first such incident when evaluating your request.

It's good that you've already set up budget alarms to prevent similar situations in the future. When contacting support, emphasize that you've taken preventative measures to ensure this won't happen again.
Sources
please refund a bill,bill ID: 1792774229 | AWS re:Post
Request for Refund Due to Unintended AWS Service Charge Within 7-Day Right of Withdrawal | AWS re:Post