AWS is pretty flexible on first-time mistakes in a particular account; I've personal knowledge of several $5-10k "whoops" bills being nulled out.
There may be a maximum threshold for this, though.
There may be a maximum threshold for this, though.
We also asked them to summarize what happened so we can think how to help other users not to make the same mistake in future.
I had a personal project, where I wanted to occasionally do short but highly parallel jobs. Once my scripts didn't close everything down correctly and a week later I had spent £600. That's a lot of money to me personally. I asked politely and it was never refunded.
So we switched to Google Cloud, which has a better UI for telling you how much you're about to spend. As we grew, we ended up spending way more money on GCP than we ever did on AWS.