At the request of an EC2 support staff, I left some machines running to help them debug an issue where machines became unreachable within minutes of being creat

At the request of an EC2 support staff, I left some machines running to help them debug an issue where machines became unreachable within minutes of being created. I was erroneously charged for this. Throughout the years Amazon has variously said that they could not refund me because they had no records from this time period or offered me AWS credits. I expect to the situation to never be resolved.