You might want to check this article about amazon scams.
https://www.forbes.com/sites/wadesh...sellers-run-amok-and-profit-big/#42c06bcf3ea6
If Forbes doesn't let you read this article, the gist of it is that a fradulent seller will delay you with promises and try to keep you from notifying Amazon. This is a pretty short window, and you lose Amazon's protection when the deadline expires. Announcing a delay is the first red flag. I hope you have a fraud or cancel case in progress on that first deal.
Another scam is when they contact you and want to be paid using an Amazon gift card. You do that and the money is unrecovereable.