If you have a reason, it is useful, if there is no evidence, it is not useful. 12345 is a non-emergency helpline for citizens. Those who need to protect their rights can call it and have it handled by professional departments. But no matter who deals with it, they need evidence, if they are rational and have evidence, there is no problem in dealing with it, the business will make, if there is no evidence, you can only negotiate, if the business is OK, if not, there is no good way.
Of course it works. 12345 is the mayor's service hotline, which is dedicated to handling local conflicts. As long as there is a complaint, it will be accepted, and then it will be fed back to the complainant after the investigation is completed.
Useful, 12345 is a platform for the common people, you tell them your demands, they will forward to deal with!
12345 complaint business will not be regulated. If the merchant has a problem, you can go to the market supervision Administration to complain.