BitPay are known hostile against Bitcoin (
https://debitpay.directory/anti-bitcoin/) and invade user privacy (more than required by regulation), but it's surprising they sold stolen/illegal Amazon gift cards.
I strongly advice you to move all cryptocurrency from BitPay elsewhere, if you haven't done it.
I already contacted Amazon support team, however, my account remains banned. Right now I'm still waiting for help from Bitpay, but unless the issue is resolved and at least spent Bitcoin cash is returned back - I will have this topic opened to warn other people of such grave danger.
If anyone by any chance ever faced this issue - please let me know. In case it will not get resolved by Bitpay support team - claim will be sent to appropriate authorities in the USA, thus I can help you to resolve the same problem too.
I would advice you to post about it on subreddit such as r/Bitcoin, r/btc and r/CryptoCurrency to warn more people or find people who faced similar issue.