Strangely enough, even after several attempts I was never able to recover my hacked AWS account (from my support calls it seems like the attacker changed the email, name, address) and have never been able to authenticate against it.
However the one thing that was never changed is my credit-card. I have offered AWS support several times to give them my credit number and ask them to unlink it from the account, but they refuse to do so without me being authenticated.
I don't want to get on Amazon's bad side, but with no options left I have been resorting to charge-backs on the credit card. Thankfully my bank has been siding with me, and each month I have been winning them -- but next month the new bill comes and I forced to repeat the process.
Not wanting to get a bad reputation with my bank or Amazon, I just asked my bank to send me a new card. But amazingly (?!!!) the next month the bill from AWS still came on the new card.
It's now been 8 months, and I'm sick of the absurdity of the situation. Is there anything I can do?