Or you could just send an email to support and ask them to waive the charges.
Really? Working in Southern California a few years ago, refund requests were refused ALL THE TIME. This is why there's a common belief that what you are charged you simply owe them, period.
It may be more progressive now, but let's not be revisionist.
I know several other companies that had expensive mistakes without refunds. There's probably a complex decision tree for these issues and I doubt anyone really knows outside of AWS.
Being an entitled jerk who blames other people for your own negligence is bad, and you shouldn't change that. But openly giving companies the opportunity to be kind (while admitting that it was entirely your fault) potentially helps both them and you.