Their final advice was to initiate a chargeback on the Visa card with my bank (this wasn't an Amazon card) and they wouldn't challenge the chargeback. I confirmed 3 times with Amazon support whether this would be counted against me in any way. They assured me, no, it wouldn't. I don't believe them but did the chargeback anyway. So far, so good, but I'm super hesitant to do returns with Amazon anymore. These giants are really doing a good job training their customers to bend over.
My concern is more the "I got a counterfeit, going through support didn't work" sort of scenario, where Amazon tells me they've investigated and don't agree I deserve a refund.
I am probably the worst Amazon customer ever.
I have had packages left outside my door (and stolen), I have had packages sent empty (like not opened... empty), I have called Amazon to complain about a microphone (and then found out it was the sound card output that was fucked)
Every single time they have sided with me. I'm sure they bring the banhammer on people who do really fradulent stuff but I've never had an issue with chargebacks.
I can't ever issue a chargeback on an Amazon charge, as doing so would risk thousands of dollars of Kindle books as well as some fairly important stuff in AWS.
(And no, a separate AWS account doesn't help. If they can link them both to you, they'll take action against both.)