Question

how should a consumer that help in the market to protect his interest

Answer 1

The consumer himself at the market can champion for his or her own rights ,This may be done through the consumer reporting malicious activities to the relevant bodies for investigation .A consumer can realize when he or she is being exploited an at such points should act without  failure since him or any other citizen is likely to go through the same challenge .

The consumers themselves can form bodies such as associations in order to champion for their rights .Such organizations can access the prices of prices to ascertain weather they are fit for the people.