1. If you find yourself cheated in the process of consumption, you can refuse to pay the merchant. At this time, if the merchants don't let you go, you can call the police because they restrict your personal freedom.

2. If you find yourself cheated after consumption, you can only complain to the Industrial and Commercial Bureau and keep your own consumption evidence, invoices and the like. If it is a commodity, keep it as evidence of complaint, complain to the website of the local industrial and commercial bureau, and tell the truth clearly.