I went through a two month long fight with AWS over a compromised account. I lost 20K even when my previous usage for the last 3 years was like $20/month, and I had more invoices coming worth tens of thousands of dollars. AWS refused to help until I stopped the breach myself, which required me to spend several all nighters after work learning how to script for AWS infra. They also refused to close my account after the breach was under control. They asked me to sign a shared responsibility agreement before they could look at my case, which I refused to do. I finally contacted the AG office in my state and they email AWS directly. In less than 24h I had a AWS manager calling me to fix my account and issue a refund for the 20K. Still, they refused to close my account after all this ordeal, apparently there’s no way for you to completely get out of AWS once you are in. It’s the shittiest business ever.

I had a similar situation where some dormant account was still charging my credit card.

The account was probably real, made for some purpose 15 years ago. I had ignored the charge for years because it was like $7 a month. Then it went to $300/month, making it worth the time. I could find no invoice email and none of my AWS accounts lined up with the bill.

I tried contacting support, but without the account number involved they had no way to help. I disputed the charge, the bank refunded that month and then went right back to charging the next month(my credit card helpfully accepted the charges despite the dispute).

I had to cancel the credit card entirely to make it stop.