For example, deceiving customers to say that they are selling gold or 18K gold. It is deceptive to write such words on promotional materials, sales documents and commodity labels, and you can report to the industry and commerce.
If the other party has no such evidence in the publicity to prove that it is cheating, but only verbally cheating, you can use sneak shots, recording and other means to obtain evidence. In short, you can only manage it if you get the fraud certificate of the other party.
If the other party is impeccable and has no fraudulent credentials, it means that customers should strengthen their understanding and not be greedy for petty gain.