I've gone through all of my accounts, and none show charges for this amount, and none are "linked" to the credit card, so it's definitely an account I don't hav

I've gone through all of my accounts, and none show charges for this amount, and none are "linked" to the credit card, so it's definitely an account I don't have access to. They won't give me information since I can't login / give credentials to the account in question. So I understand why they can't access that account, but I can't explain why they refuse to stop charging a credit card that I have in my possession and am the owner of.