I had an ECS cron job hang one time, so instead of a 30 second compute charge it ended up being almost a full month of continuous runtime. My usual $30 bill was $800, and the estimated charges for the next month based on 2 days of use was $1300. I didn't have a billing alert setup (definitely setup a billing alert!).
It could not have been easier to get AWS to remove the charge. A quick email to support with a brief explanation and it was immediately accepted. The hardest part was that they wanted a very specific request for how much I was asking to be refunded. So I had to go back and calculate my average costs per service and compare that to the charged costs. After that it was immediately refunded.
They aren't just handing these things out though. They made me read and acknowledge I had read their service agreements and basically swear that I know what happened and it won't happen again. Really painless process overall, all things considered.
It could not have been easier to get AWS to remove the charge. A quick email to support with a brief explanation and it was immediately accepted. The hardest part was that they wanted a very specific request for how much I was asking to be refunded. So I had to go back and calculate my average costs per service and compare that to the charged costs. After that it was immediately refunded.
They aren't just handing these things out though. They made me read and acknowledge I had read their service agreements and basically swear that I know what happened and it won't happen again. Really painless process overall, all things considered.