How to complain about buying fakes when traveling to Hong Kong?

If you don't know the complaint number, you can ask the Hong Kong police for help. The police there are different from the mainland police. They are all very enthusiastic. As long as you ask for help, they will tell you that I have a complaint phone number, but I am not around now, so I will give you this method. You can ask. Because I have to go to Hong Kong once a year, I know that. My suggestion is for your reference and I hope it can help you!