I'm currently dealing with a situation as an Amazon seller where I think the buyer is trying to scam me (claiming I sent the product wrong/late, hoping they can

I'm currently dealing with a situation as an Amazon seller where I think the buyer is trying to scam me (claiming I sent the product wrong/late, hoping they can manipulate the return process to both get a refund and keep the product because of Amazon's notoriously customer-biased policies). I wonder how this plays in.