In Russia, Kazakhstan and Belarus
Russia
You can file a complaint online on the agency's website, through Gosuslugi or in person at a regional office. The service can issue a company a warning, carry out an inspection if there is a threat to life and health, and give an opinion on a case in court.
Kazakhstan
In Kazakhstan consumer rights are protected by the Consumer Rights Protection Committee (Комитет по защите прав потребителей) of the Ministry of Trade and Integration and its territorial departments.
Belarus
In Belarus complaints about sellers are accepted by local executive committees (исполкомы) and the Ministry of Antimonopoly Regulation and Trade (МАРТ), while sanitary supervision is carried out by hygiene and epidemiology centres.
Sources: Rospotrebnadzor («Роспотребнадзор»), State information resource on consumer rights protection («Государственный информационный ресурс в сфере защиты прав потребителей»)