I had a similar experience, with costs of $100 incurred over a four-month period. All it took was on email to AWS support, and they refunded the entire thing.

I had a similar experience, with costs of $100 incurred over a four-month period. All it took was on email to AWS support, and they refunded the entire thing. I was impressed, but still have been really trying to keep off AWS just to not have a mistaken repeat.