Terribly sorry for the worry this matter must be causing you.
In order to have this issue resolved you'll need to reach out to our Account & Billing support team via your Support Center.
Even if your account is in a closed state, you'll still be able to login and create support cases.
Please create a case, and mention the case ID linked to the compromised account issue. To ensure this matter is dealt with in a swift manner, I recommend making use of our callback / chat option: https://aws.amazon.com/premiumsupport/knowledge-center/aws-phone-support/.
- Rafeeq C.
Hi Rafeeq, Thanks for the reply, but I cannot login to my old account, it always returns 400 error.
Thanks for responding with that information.
In that case, please contact our Support team, using the following contact form (which does not require login), here: https://support.aws.amazon.com/#/contacts/aws-account-support.
-- Ben G.
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