According to the relevant data of Baidu Law Pro, if the hair dye used in the barber shop does not match the group purchase package, the following methods can be taken:
1. Communicate with the barber shop: First of all, you can communicate with the person in charge or staff of the barber shop to explain that you have purchased the group purchase package, but the hair dye used does not match the package. You can ask them if they can provide you with appropriate solutions such as dyeing your hair or refunding it.
2. Contact the group buying platform: If you bought the package through the group buying platform, you can contact the customer service of the platform, reflect the problem to them and ask them to help you solve the problem.
3. Protection of consumers' rights and interests: If you think that your consumers' rights and interests have been infringed, you can complain to the local consumers' association or relevant departments and seek their help and support.
Group buying, that is, group shopping, refers to the combination of consumers who know or don't know each other to increase their bargaining power with merchants in order to obtain the most favorable price. According to the principle of small profits but quick turnover, merchants can give group discounts below the retail price and quality services that individuals can't get.