Since the patent party took pictures of the product and planned to sue, it is very likely that the patent owner made a notarized purchase. The screenshot of the webpage is strong evidence of patent infringement. It seems you are only selling the product online, right? If so, you can provide the legal source of the product, such as purchase orders, invoices, etc., and have the contact information of the supplier. Even if the patent party sues you, you don’t have to compensate, you just need to stop selling.