Without mutual consent or fairness, even the most authoritative organization can only be responsible for the samples. So how do you prove that the product you sent for inspection was bought from an Amazon?

Contact the seller to reach an agreement and go to a quality inspection institution recognized by both parties, such as Hunan Quality Inspection Institute, and the unqualified merchants will be responsible.

If the merchants don't care, you can call 123 15 to complain if you want to find a merchant in the circulation field.

You can entrust the quality inspection association of the local quality supervision bureau to carry out quality appraisal or arbitration inspection, which of course needs the approval of both parties.

If you really can't, go to court.

Anyway, it's very troublesome.