How to write a complaint against Tik Tok businessmen?

Complaints against Tik Tok merchants can be written as follows: the goods sold by the merchants are not guaranteed in quality, the goods returned by the merchants are not handled, and the goods sold by the merchants do not match the actual goods. For example, health care products, after receiving the goods, I found that the physical packaging of the goods did not even have the approval number and health food label. The merchant's page advertised that this product can enhance immunity and other health care functions. I planned to buy it for the elderly at that time, and the price of things was not cheap. I didn't expect even the approval number. How dare I give it to the elderly? It is irreversible that there is something wrong with the diet of the elderly. This behavior of merchants is a serious food safety hazard. The products of the merchants have not obtained the qualification of Chinese herbal pieces and health care products, and the standard blue hat logo has been implemented. Wall-broken ganoderma lucidum spore powder belongs to health food and can't be sold as ordinary food at all.