I'm still not grokking what you're describing? Are you saying you went to a website to buy hearing protection, and the purchase was rejected, and your understanding is that it was stopped due to malicious actors other than the business you were trying to buy from?
The business's credit card processor marked your transaction as fraudulent? Or your bank rejected it? Or the item was out of stock and their site handles that in an unclean way?
I'm not in a position to speak confidently to why a website rejected a transaction, but if you're going to, you really ought to be able to back it up with something more than "why else would it be?".